Robert Mills Gagné proposed that learning is a dynamic process formed by interacting internal cognitive activities and the external environment, through which learners construct a comprehensive ...

Studies with dynamic venous duplex sonography confirmed the importance of jugular-vein-valve insufficiency. We review these new findings and their implications for a better understanding of this ...

21 The arteries and veins ... s anatomy: the anatomical basis of medicine and surgery. 40th ed. London: Churchill Livingstone; 2008. 1036 p. 2 Bilhim T, Casal D, Furtado A, Pais D, O’Neill JEG, Pisco ...