Η ανεπάρκεια βιταμίνης D healthline.com http://www.healthline.com/health/vitamin-d-deficiency vitamin D deficiency Healthline: Vitamin D A deficiência de vitamina D La deficiencia de vitamina D Kekurangan vitamin D Vitamin-D-Mangel Une carence en vitamine D विटामिन डी की कमी healthline.com healthline.com The Effects of Vitamin D Deficiency ビタミンD欠乏症 vitamin D deficiency