Pediatric Research 4, 466–467 (September 1970), DOI 10.1203/00006450-197009000-00130. Primary byline includes Titus H J Huisman and Walter A Schroeder; affiliations include the California Institute of Technology. Abstract: serial measurements of G-gamma and A-gamma chain proportions in seven infants, distinguished by residue 136. Author information directly verifies the expanded Walter A. Schroeder identity.