Readings in Gerontology

accumulation acid activity acute advancing alterations amount animals appear arthritis associated become blood body bone brain calcium cause cells cent cerebral changes clinical collagen components connective considered cytoplasm decrease described difficulty disease disorders effects elderly enzymes evidence factors findings frequently function given hearing heart hormone human important incidence increase indicated individuals involved joint known later lesions less linking living loss major measures mice muscle nature nerve normal nucleus observed occur old age older organs osteoporosis pain patients percent period persons physical pigment population possible present probably problems progressive proteins recent relatively remains reported response result rheumatoid seen senile severe shown significant similar social stroke structure studies subjects suggested symptoms synthesis therapy tion tissue treatment usually various women young