Twenty two healthy men aged 21-66 yr ( mean +/- SD 41 . 0 +/- 13 . 6 ) and nineteen healthy women aged 22-60 yr ( 38 . 9 +/- 13 . 9 ) have been studied .
twenty two healthy men aged 21-66 yr ( mean +/- sd 41 . 0 +/- 13 . 6 ) and nineteen healthy women aged 22-60 yr ( 38 . 9 +/- 13 . 9 ) have been studied .
O O B-multi_cell I-multi_cell O O O O O O O O O O O O O O O O O B-multi_cell I-multi_cell O O O O O O O O O O O O O O O O