title: A Tale of Four Cities: May 12-24, 2015, Reykjavik, Amsterdam, Rotterdam, and Copenhagen.
authors.affiliation: Department of Dermatology, Johns Hopkins University, Baltimore, MD, and Charles County Dermatology Associates, White Plains, MD; rsbcsb@aol.com.
authors.forename: Robert S
authors.initials: RS
authors.lastname: Berger