Professor Susan M. Sawyer, a renowned pediatrician and adolescent health expert, shared details about a recent compelling study done by MCRI in Melbourne, Australia, on the prevalence of anxiety and depression among teenagers, especially among girls. Professor Susan M. Sawyer, a renowned pediatrician and adolescent health expert, shared details about a recent compelling study done by MCRI in Melbourne, Australia, on the prevalence of anxiety and depression among teenagers, especially among girls.