Genetic deletion of ghrelin does not decrease food intake but influences metabolic fuel preference. - Wortley,K.E.; Anderson,K.D.; Garcia,K.; Murray,J.D.; Malinova,L.; Liu,R.; Moncrieffe,M.; Thabet,K.; Cox,H.J.; Yancopoulos,G.D.; Wiegand,S.J.; Sleeman,M.W. (Proc Natl Acad Sci U S A, 2004)