RESULTS	At baseline , subjects were low weight ( body mass index [ calculated as weight in kilograms divided by the square of height in meters ] 20.6 + / - 0.4 ) , with significant weight loss from pre-illness maximum weight ( 18.7 % + / - 1.2 % ) , and demonstrated reduced muscle function ( upper and lower extremity muscle strength , 83 % and 67 % , respectively , of predicted range ) .\