Systemic ghrelin levels in subjects with growth hormone deficiency are not modified by one year of growth hormone replacement therapy. - Janssen,JA.; van der Toorn,FM.; Hofland,LJ.; van Koetsveld,P.; Broglio,F.; Ghigo,E.; Lamberts,SW.; Jan van der Lely,A. (Eur J Endocrinol, 2001)