Measurement of insulin-like growth factor I (IGF-1) in normal adults, patients with liver cirrhosis and acromegaly: experience with a new competitive enzyme immunoassay - Kratzsch, J; Blum, WF; Schenker, E; Keller, E; Jahreis, G; Haustein, B; Ventz, M; Rotzsch, W (Exp Clin Endocrinol, 1993)