O lymp ic ▁gold ▁medal ists ▁for ▁Argentina ▁Category : Ar gent ine ▁exp atri ate ▁football ers ▁Category : Ex pat ri ate ▁football ers ▁in ▁Spain ▁Category : Ar gent ine ▁exp atri ate ▁sports people ▁in ▁Spain <0x0A> </s> ▁Mark ▁A . ▁Hard y ▁is ▁Auch in cl oss ▁Professor ▁of ▁S urg ery , ▁Director ▁Emer it us ▁of ▁the ▁Trans plant ▁Centre , ▁and ▁Vice ▁Chair man ▁and ▁Res iden cy ▁Program ▁Director ▁of ▁the ▁Department ▁of ▁S urg ery ▁at ▁the ▁Columbia ▁University ▁College ▁of ▁Phys icians ▁and ▁Sur ge ons ▁and ▁New Y ork - Pres by ter ian ▁Hospital ▁in ▁New ▁York ▁City . ▁ ▁Hard y ▁is ▁most ▁recognized ▁for ▁co - found ing ▁the ▁New ▁York ▁Organ ▁Don or ▁Network ▁in ▁ 1 9 7 8 ▁( N Y OD N ▁ 2 0 0 6 ). ▁In ▁addition ▁to ▁his ▁work ▁in ▁trans plant ation , ▁in ▁the ▁earlier ▁part ▁of ▁his ▁career ▁he ▁made ▁several ▁contributions ▁to ▁the ▁development ▁of ▁prost h etic ▁v asc ular ▁gra ft s ▁and ▁the ▁development ▁and ▁studies ▁of ▁bi olog ic ▁function ▁of ▁th ym ic ▁h orm ones , ▁both ▁experiment ally ▁and ▁clin ically . ▁ ▁Hard y ▁laid ▁another ▁corner stone ▁of ▁organ ▁trans plant ▁medicine ▁by ▁helping ▁found ▁the ▁program ▁for ▁d ial ysis ▁and ▁kid ney ▁trans plant ation ▁at ▁New Y ork - Pres by ter ian ▁Hospital . ▁He ▁based ▁the ▁new ▁program ▁on ▁the ▁principle ▁of