He graduated in 1906 and studied psychiatry in Europe under Sigmund Freud in 1910 .
As a young man , Sadler worked for several Christian missionary and charitable organizations and attended American Medical Missionary College .
Sadler graduated in 1906 and studied psychiatry in Europe under Sigmund Freud in 1910 .
As a young man , Sadler worked for several Christian missionary and charitable organizations and attended American Medical Missionary College .