Wellington, Dec 26 NZPA - Police are concerned for a 78-year-old man who went missing from Waikato Hospital today.

Bruce Wells, from Coromandel, was being treated at the hospital for bone cancer.

He did not have family in Hamilton and had been missing since around midday.

Fluoridation causes more premature births, one of the top causes of infant death in the USA. It poses the greatest risk to poor non-white mothers and babies. This is the finding State University of New York researchers from data spanning 1993 to 2002.