"vitamin D - vitamin D receptors - tumours - sun" . "vitamin D" . "vitamin D - senior - osteoporosis - sarcopenia - depression" . "vitamin D" . . . "vitamin D - vitamin D receptor - sarcopenia - cardiac failure - dementia - depression" . "vitamin D - senior - sarcopenia - osteoporosis - hypovitaminosis" . "vitamin D - vitamin D receptor - sun - nursing homes - tumours" .