growth ( weight , length , mid-upper arm circumference ) , acid-base status , serum electrolyte levels , and selected parameters of urine ( creatinine and electrolyte levels , urine ph , renal net acid excretion , levels of metabolites of aldosterone ) were determined serially from the 10th to the 32nd days for 4 weeks in 21 premature infants ( birth weight , 1,100-2,000 g ) fed either formula a or formula b ( formula b was formula a supplemented with chloride , potassium , and calcium ) .
C0005910
weight
C0005612
birth weight