What is the fine-grained topic of the following text: She received her PhD in Clinical Psychology from Ryerson University and completed a postdoctoral fellowship through Frederick W. Thompson Anxiety Disorders Centre at Sunnybrook Health Sciences Centre, which offers specific expertise in the assessment and treatment of Obsessive-Compulsive and Related Disorders (e.g., OCD, hair pulling, skin picking, and body dysmorphic disorder). Only return the topic.
The professional credentials and expertise of a Clinical Psychologist specializing in Obsessive-Compulsive and Related Disorders.