Jerry Shapiro, MD, FAAD, FRCPC is professor and director, Disorders of the Hair and Scalp, The Ronald O. Perelman Department of Dermatology, New York University Grossman School of Medicine, New York, USAKristen Lo Sicco, MD, FAAD, associate professor of dermatology, Director of the NYU Skin and Cancer Unit, The Ronald O. Perelman Department of Dermatology, New York University Grossman School of Medicine, New York, USANina Otberg, MD, is Head of Department, Hair Clinic, Skin and Laser Center Berlin-Potsdam; and clinical lead and founder, Otberg Medical Hair Transplant Center, Berlin-Potsdam, GermanyDonna Cummins, MB BCh BAO, MRCPI, MRCP (UK) (Dermatology) The Dermatology Centre, Salford Royal Hospital, Manchester, UKHsiao-Han Tuan, MD, Department of Dermatology, Beijing Tsinghua Changgung Hospital, School of Clinical Medicine, Tsinghua University, Beijing, China