Nicolaidou, Polyxeni Kakourou, Talia Papadopoulou, Anna and Kavadias, Georges Dimitriou, Elizabeth Georgouli, Helen and Tsapra, Helen Giannoulia-Karantana, Aglaia Fretzayas, Andreas and Tsiftis, Georges Bakoula, Chryssa, Low vitamin D status in preschool children in Greece, Nutrition Research, (26), 620-625, 2006, PERGAMON-ELSEVIER SCIENCE LTD, 0271-5317