For almost 30 years, parents sought out Dr. Reginald Archibald when their children would not grow. They came to his clinic at The Rockefeller University Hospital, a prominent New York research institution. He also may have sexually abused many of them. The hospital sent a letter last month to former patients of Dr. Archibald asking about their contact with him [and] posted a statement online saying it had evidence of the doctor's inappropriate" behavior with some patients and that it first had learned of credible allegations against him in 2004. The New York Times spoke with 17 people, most of them men, who said they were abused by Dr. Archibald when they were young boys or adolescents. Most of them learned of the possibility of other victims for the first time when they received the letter. A few, however, said they had filed complaints with the hospital or authorities in the past, but their allegations were not investigated. The men all described similar experiences with Dr. Archibald, who would tell them to disrobe when they were alone in his examination room. He would masturbate them or ask them to masturbate. The doctor took pictures of them, while they were naked, with a Polaroid camera, and measured their penises both flaccid and erect. The alleged abuse would have occurred in an era in which few safeguards existed for those patients. Under current New York law, the statute of limitations for victims to sue the hospital has long passed. A hospital spokesman declined to answer questions about when the hospital first learned of the allegations. [An] inquiry turned up two ... reports dating to the 1990s.