problems in infancy.
[ncbi.nlm.nih.gov]
During infancy these children often have feeding problems, failure to thrive, weak muscle tone, prolonged napping and lethargy.
[dailymail.co.uk]
[…] at least 5 of the following: obesity, compulsive eating, mental retardation, short stature, central hypotonia, hypogonadism, small hands and feet, hypopigmentation, and feeding
[ncbi.nlm.nih.gov]