Alpha Tau Sigma

Alpha Tau Sigma (ΑΤΣ) was a professional medical fraternity that ceased operations in 1964.
History.
Alpha Tau Sigma Fraternity was a professional medical fraternity founded in 1912 at the American School of Osteopathy, now the private A.T. Still University, in Kirksville, Missouri. 
Its founders were:
The Fraternity incorporated in 1915, with the intention and members were empowered to begin expansion to other recognized colleges of osteopathy. However, although the chapter remained successful on its "Alpha" campus, it never grew beyond a local entity.
Archived member lists note at least 45 members among one member's network, scattered in the states of Missouri, Oklahoma and Kansas, with a few elsewhere.
Alpha Tau Sigma ceased operations in 1964.