- Implications of intragenic marker homozygosity and haplotype sharing in a rare autosomal recessive disorder: the example of the collagen type XVII (COL17A1) locus in generalised atrophic benign epidermolysis bullosa. Scheffer, H., Stulp, R.P., Verlind, E., van der Meulen, M., Bruckner-Tuderman, L., Gedde-Dahl, T., te Meerman, G.J., Sonnenberg, A., Buys, C.H., Jonkman, M.F. Hum. Genet. (1997)