Access Hollywood didn't report Clark's condition or where he had the stroke. Last April, Clark announced he had type 2 diabetes, formerly called adult-onset diabetes, since 1994, but kept it a secret from everyone except close friends and family. Clark is now a spokesman for the American Association of Diabetes Educators and the pharmaceutical maker Merck & Co. Clark, 75, was a Philadelphia radio disc jockey in the early 1950s, when he took over a local show, American Bandstand, on WFIL-TV. Clark's show was later syndicated nationally and he moved to Los Angeles as his entertainment empire expanded. In 1973,...