A soluble PC-1 circulates in human plasma: relationship with insulin resistance and associated abnormalities. - Frittitta,L.; Camastra,S.; Baratta,R.; Costanzo,BV.; D'Adamo,M.; Graci,S.; Spampinato,D.; Maddux,BA.; Vigneri,R.; Ferraninin,E.; Trischitta,V. (J Clin Endocrinol Metab, 1999)