Charles A. Yankah (EDT)/ Yuguo Weng M.D. (EDT)/ Roland Hetzer (EDT)
(1)
Linda Hetzer/ Meg Hartigan (ILT)
(1)
Linda Hetzer/ Robert Penny (ILT)
(1)
Michael Hess (Duisburg Universitat),Jim Hetzer,Sal Piro
(1)
Roland Hetzer (EDT)/ J. Scott Rankin (EDT)/ Abraham Charles Yankah (EDT)
(1)