- Heterozygous glycine substitution in the COL11A2 gene in the original patient with the Weissenbacher-Zweymüller syndrome demonstrates its identity with heterozygous OSMED (nonocular Stickler syndrome). Pihlajamaa, T., Prockop, D.J., Faber, J., Winterpacht, A., Zabel, B., Giedion, A., Wiesbauer, P., Spranger, J., Ala-Kokko, L. Am. J. Med. Genet. (1998)