From the article:
"Boston Children's Hospital doctor Colleen Ryan insisted she and other medical staff were doing what was best for Pelletier. She testified that Pelletier’s parents would obsess over her medical problems in a way that would make her worse. Ryan told jurors that’s why she recommended that the hospital and Department of Children and Families, which had taken custody of Pelletier, limit the contact between the girl and her parents".
"In earlier statements, one of Ryan’s lawyers said that Boston Children’s Hospital doctors had learned that Pelletier seemed to do better when her parents were not present. In her testimony, Ryan said the parents often became belligerent during meetings, which added to suspicions that her parents might have actually been causing some of Pelletier’s symptoms".
They were accusing the parents of making her health worse. Perhaps child abuse was suspected?