Lall Ramnath Sawh CMT, FRCS (Edin) (born 1 June 1951) is a Trinidadian urologist in the Caribbean and Latin America. Based in Trinidad and Tobago, Sawh was a pioneer of kidney transplantation in the Caribbean in 1988 and is a recognized leader in the field of urology.
Kidney transplantation is based in Trinidad and Tobago. 
Trinidad and Tobago is where the surgeon was based, not kidney transplantation in general. 
( z1 base :ARG1 ( z2 transplant :ARG1 ( z3 kidney ) ) :location ( z4 country :name ( z5 name :op "Trinidad" :op "and" :op "Tobago" ) ) )