1 St. Mary's Research Centre (Kanou, Litvinov); Division of Dermatology (Alamari, Litvinov), McGill University; St. Mary's Hospital Centre (Litvinov), Montréal, Que.
2 St. Mary's Research Centre (Kanou, Litvinov); Division of Dermatology (Alamari, Litvinov), McGill University; St. Mary's Hospital Centre (Litvinov), Montréal, Que. ivan.litvinov@mcgill.ca.