Vincent Anthony DeLeo

Department of Dermatology, Keck School of Medicine, University of Southern California, Los Angeles.

Division of Dermatology, University of Ottawa, Ontario, Canada

Department of Dermatology, Columbia University Irving Medical School, New York, NY

Division of Dermatology, Montreal General Hospital, McGill University, Montreal, Quebec, Canada

Associates in Dermatology, Fort Myers, FL

Department of Dermatology, Keck School of Medicine, University of Southern California, 1441 Eastlake Avenue, Ezralow Tower, Suite 5301, 90033, Los Angeles, CA, USA

Keck School of Medicine, University of Southern California, Los Angeles, and the Icahn School of Medicine at Mount Sinai, New York, New York, USA.

From the *Department of Dermatology, University of Minnesota Medical School; †Department of Dermatology, Minneapolis Veterans Affairs Medical Center; ‡HCMC Parkside Occupational and Contact Dermatitis Clinic; §University of Minnesota School of Medicine, Minneapolis; ∥Division of Dermatology, Sunnybrook Health Sciences Centre, University of Toronto, Ontario, Canada; ¶Department of Dermatology, University of California San Francisco; #Department of Dermatology, Cleveland Clinic, OH; **Division of Dermatology, Royal Victoria Hospital, McGill University, Montreal, Quebec, Canada; ††Columbia University Medical Center, New York; ‡‡University of Louisville, KY; §§Associates in Dermatology, Fort Myers, FL; ∥∥Department of Dermatology, Keck School of Medicine, Los Angeles, CA; ¶¶Department of Dermatology, Pennsylvania State University, State College; ##Division of Dermatology, University of Ottawa, Ontario, Canada; ***Department of Dermatology, University of Cincinnati, OH; †††Ohio State University, Columbus; and ‡‡‡Dartmouth-Hitchcock Medical Center, Lebanon, NH.

From the *HCMC Parkside Occupational and Contact Dermatitis Clinic and Department of Dermatology, Minneapolis Veterans Affairs Medical Center; †Department of Dermatology, University of Minnesota Medical School, Minneapolis; ‡Division of Dermatology, Royal Victoria Hospital, McGill University, Montreal, Quebec, Canada; §Department of Dermatology, University of California San Francisco; ∥Division of Dermatology, Sunnybrook Health Sciences Centre, University of Toronto, Ontario, Canada; ¶Department of Dermatology, Columbia University, New York, NY; #University of Louisville, KY; **Dartmouth-Hitchcock Medical Center, Lebanon, NH; ††Department of Dermatology, Cleveland Clinic; ‡‡Department of Dermatology, University of Cincinnati, OH; §§Associates in Dermatology, Fort Myers, FL; ∥∥University of Southern California, Keck School of Medicine, Los Angeles; ¶¶Department of Dermatology, Pennsylvania State University, University Park; ##Division of Dermatology, University of Ottawa, Canada; ***Ohio State University, Columbus; and †††Department of Dermatology, Oregon Health Science University, Portland.

From the Department of Dermatology, Keck School of Medicine of the University of Southern California, Los Angeles.

From the University of Minnesota and the Minneapolis VAMC; University of California, San Francisco; Cleveland Clinic, Ohio; McGill University Health Centre, Montreal; University of Toronto, Canada; Ohio State University, Columbus; Associates in Dermatology, Fort Myers, Fla; Group Health Associates, Cincinnati, Ohio; Dartmouth Medical Center, Lebanon, NH; St. Luke’s Roosevelt Hospital Center, New York, NY; Dermatology Specialists, Louisville, KY; Pennsylvania State University Hershey; University of Ottawa, Canada; Oregon Health Sciences University, Portland; and Columbia University Medical Center, New York, NY.

From the *Section of Dermatology, Department of Surgery, Dartmouth-Hitchcock Medical Center, Lebanon, NH; †Geisel School of Medicine at Dartmouth, Hanover, NH; ‡Columbia University Medical Center, New York, NY; §University of Toronto, Ontario, Canada; ∥St Luke’s Roosevelt Hospital Center, Columbia University, New York, NY; ¶University of Louisville, KY; #Associates in Dermatology, Fort Myers, FL; **University of California-San Francisco; ††Penn State Milton S. Hershey Medical Center, Hershey, PA; ‡‡Department of Dermatology, Group Health Associates, Cincinatti, OH; §§University of Ottawa, Ontario; ∥∥McGill University Health Centre, Montreal, Quebec, Canada; ¶¶Oregon Health Science University, Portland, OR; ##Cleveland Clinic, OH; ***Department of Dermatology, Minneapolis VA Health Care System, University of Minnesota; and †††Ohio State University, Columbus.

From the *Department of Dermatology, Veterans Affairs Medical Center, University of Minnesota; †University of Minnesota Medical School, Minneapolis, Minn; ‡Department of Dermatology, University of California San Francisco; §Department of Dermatology, Columbia University, New York, NY; ∥Dartmouth-Hitchcock Medical Center, Lebanon, NH; ¶Department of Dermatology, Cleveland Clinic; **Department of Dermatology, University of Cincinnati; ††Dermatology Department, Ohio State University, Columbus; ‡‡University of Louisville, KY; §§Dermatology Department, University of Toronto, Canada; ‡‡‡Associates in Dermatology, Fort Myers, Fla; ∥∥Department of Dermatology, Pennsylvania State University, Hershey; ¶¶Division of Dermatology, University of Ottawa, Ontario, Canada; ***Department of Dermatology, Oregon Health Science University, Portland; and †††Division of Dermatology, Royal Victoria Hospital, McGill University, Montreal, Canada.

Division of Dermatology University of Louisville Louisville, KY Department of Dermatology University of California San Francisco San Francisco, CA Department of Dermatology Ohio State University Columbus, OH Department of Dermatology Cleveland Clinic Cleveland, OH Division of Dermatology Sunnybrook Health Sciences Center University of Toronto Toronto, Ontario, Canada Division of Dermatology Royal Victoria Hospital McGill University Montreal, Quebec, Canada Department of Dermatology Veterans Affairs Medical Center University of Minnesota Minneapolis, MN Department of Dermatology Columbia University New York, NY Department of Dermatology Oregon Health Sciences University Portland, OR Dartmouth-Hitchcock Medical Center Lebanon, NH Division of Dermatology University of Ottawa Ontario, Canada Department of Dermatology University of Cincinnati Cincinnati, OH Department of Dermatology Columbia University New York, NYAnthony F. Fransway, MD Fort Myers, FL James G. Marks, MDDepartment of DermatologyPennsylvania State UniversityHershey, PA Department of Dermatology Pennsylvania State University Hershey, PA

Columbia University, New York City, New York

From the North American Contact Dermatitis Group. Funded by an American Contact Dermatitis Society Clinical Research Grant.

St. Luke's-Roosevelt Hospital Center, 1090 Amsterdam Ave, Suite 11D, New York, NY 10025, USA.

Department of Dermatology, Columbia University, St Luke's Roosevelt Hospital Center, New York, New York

Dartmouth‐Hitchcock Medical Center, Lebanon, NH

University of Minnesota and Veterans Affairs Medical Center, Minneapolis, MN

North American Contact Dermatitis Group

Department of Dermatology, St. Luke's Roosevelt Hospital Center, New York, NY, USA.

St. Luke's Roosevelt and Beth Israel Medical Centers, New York, NY, USA

Department of Dermatology, St. Luke's/Roosevelt Hospital Center, New York

Detroit; St. Luke's/Roosevelt Hospital Center

From the North American Contact Dermatitis Group. Address reprint requests to Dr. Melanie Pratt, 413‐1095 Carling Avenue, Ottawa, ON, Canada K1Y 4P6; E‐mail: kellypratt@sympatico.ca

Department of Dermatology, St. Luke’s–Roosevelt Hospital Center and Beth Israel Medical Center, New York, New York., USA

From the North American Contact Dermatitis Group, 1992-1998

Departments of Dermatology and Hematology‐Oncology, St. Luke's‐Roosevelt Hospital Center, NY, USA; Columbia University College of Physicians and Surgeons, NY, USA and Memorial Sloan‐Kettering Hospital, NY, USA

Associate Professor of Clinical Dermatology, Department of Dermatology, College of Physicians and Surgeons of Columbia University

Chairman of Dermatology, St. Luke's-Roosevelt Hospital Center and Beth Israel Medical Center, New York, New York

From the Department of Dermatology, Wake Forest University School of Medicine, Winston-Salema; private practice, Fort Myersb; Department of Dermatology, University of Kansas Medical Center, Kansas Cityc; Department of Dermatology, Columbia-Presbyterian Medical Center, New Yorkd; Department of Dermatology, University of Louisville School of Medicinee; Department of Dermatology, University of California, San Franciscof; Division of Dermatology, Penn State Milton S. Hershey Medical Center, Hersheyg; Group Health Associates, Cincinnatih; Department of Dermatology, University of Ottawai; Dermatology, Oschner Clinic, New Orleansj; and Cleveland Clinic.k

Winston-Salem, North Carolina; Fort Myers, Florida; Kansas City, Kansas; New York, New York; Louisville, Kentucky; San Francisco, California; Hershey, Pennsylvania; Cincinnati and Cleveland, Ohio; Ottawa, Canada; and New Orleans, Louisiana

Department of Dermatology, St Luke's Roosevelt Hospital, New York

Henry Ford Health System, Columbia University School of Medicine, New York, NY, USA.

Department of Dermatology, Columbia University College of Physicians and Surgeons, New York, New York, U.S.A.

North American Contact Dermatitis Group and * St. Luke's Hospital, Manila, Philippines.

†Deceased

From Division of Dermatology, The Pennsylvania State University, College of Medicine, Hershey, Pa

Hershey, Pennsylvania; Kansas City, Kansas; New York, New York; Louisville, Kentucky; Ft. Myers, Florida; San Francisco, California; Cincinnati, Ohio; Baltimore, Maryland; New Orleans, Louisiana; Winston-Salem, North Carolina; Portland, Oregon; and Cleveland, Ohio

Department of Dermatology, St Luke's Roosevelt Hospital Center, New York, NY 10025, USA

Department of Dermatology, Columbia University, New York, New York

Columbia University, New York, NY, et al.

Department of Dermatology, Columbia University, New York, N.Y., USA

Department of Dermatology, Columbia University, VC‐15 630 West 168th Street, New York, NY 10032, USA

Department of Dermatology, Columbia University, New York, NY, U.S.A

Department of Dermatology, Columbia University, New York, New York, U.S.A.

Departments of Dermatology, College of Physicians and Surgeons of Columbia University, New York, USA

Department of Dermatology, Columbia‐Presbyterian Medical Center, New York, New York