Association between Serum Atypical Fibroblast Growth Factors 21 and 19 and Pediatric Nonalcoholic Fatty Liver Disease - Alisi, A; Ceccarelli, S; Panera, N; Prono, F; Petrini, S; De Stefanis, C; Pezzullo, M; Tozzi, A; Villani, A; Bedogni, G; Nobili, V (PLoS One, 2013)