Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. Johann Otto Leonhard Heubner (January 21, 1843 October 17, 1926) was a German internist and pediatrician who was a native of Mühltroff. He studied medicine at the University of Leipzig, and in 1867 became an assistant to Carl Reinhold August Wunderlich (1815-1877) at Leipzig. He later founded a children s hospital and clinic in Leipzig, and in 1891 was appointed to the chair of pediatrics. In 1894 he moved to Berlin and became director of the children s clinic and polyclinic at the Charité. Heubner is considered one of the fathers of pediatric medicine. He also made important contributions to the treatment of infectious and gastrointestinal diseases.