Prospective, Open-Label, 18-Month Trial of Calcium Hydroxylapatite (Radiesse) for Facial Soft-Tissue Augmentation in Patients with Human Immunodeficiency Virus-Associated Lipoatrophy: One-Year DurabilitySilvers, Stacey L.; Eviatar, Joseph A.; Echavez, Michael I.; Pappas, Alexandra L. · Plastic and Reconstructive Surgery · 2006