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    Lyubomir Penev,     Gregor Hagedorn,     Daniel Mietchen,     Teodor Georgiev,     Pavel Stoev,     Guido Sautter,     Donat Agosti, Andreas Plank,     Michael Balke,     Lars Hendrich, Terry Erwin

    Lyubomir Penev,     Donat Agosti,     Teodor Georgiev, Terry Catapano,     Jeremy Miller,     Vladimir Blagoderov, David Roberts,     Vincent Smith, Irina Brake, Simon Ryrcroft, Ben Scott,     Norman Johnson,     Robert Morris,     Guido Sautter, Vishwas Chavan,     Tim Robertson, David Remsen,     Pavel Stoev,     Cynthia Parr,     Sandra Knapp,     W. John Kress, Frederic Thompson, Terry Erwin