TABLE 1.

Laboratory and clinical parameters for twin A at different times

	Age (months)
	26	28	31
Laboratory value (normal range)
Stool α-1 antitrypsin (0–0.5 mg/g)	>1.13 (H)	0.08	0.23
Albumin (3–4.6 g/dl)	3.0	4.2	4.3
IgG (400–1,300 mg/dl)	109 (L)	603	509
Hemoglobin (11–12.8 g/dl)	7.4 (L)	12.2	12.6
Iron (50–120 mg/dl)	13 (L)		72
25-OH vitamin D (30–80 ng/ml)	12.5 (L)	44.9	41.9
TG (<75 mg/dl)	112 (H)		56
Growth parameter
Weight (kg)	7.05	8.62	9.63
Weight z-score	−6.14	−4.27	−3.47
Height (cm)	74	76	83
Height z-score	−4.12	−3.97	−2.1

Laboratory results and growth parameters for twin A at 26 months of age while on an extensively hydrolyzed formula, at 28 months of age status post parenteral nutrition and on a low-fat enteral diet, and at 31 months of age continuing on a low-fat diet. Growth parameter z-scores based on CDC growth chart for boys 2–20 years old. H, high; L, low.