The clinical outcome of prospective screening for multiple endocrine neoplasia type 2A. An 18-year experience. - Gagel,R.F.; Tashjian,A.H Jr.; Cummings,T.; Papathanasopoulos,N.; Kaplan,M.M.; DeLellis,R.A.; Wolfe,H.J.; Reichlin,S. (N Engl J Med, 1988)