Surgeons Dermatologic Procedures medicine.medical_specialty Time Factors business.industry Posture Human factors and ergonomics Alopecia Dermatology General Medicine Patient Positioning Biomechanical Phenomena Occupational Diseases Surveys and Questionnaires Tissue and Organ Harvesting Humans Medicine Surgery Ergonomics Musculoskeletal Diseases Hair transplantation business Hair Follicle Dermatologists