I. Groenewald

Molecular analysis reveals a high mutation frequency in the first untranslated exon of the PPOX gene and largely excludes variegate porphyria in a subset of clinically affected Afrikaner families.

J. Groenewald, M. Kotze, O. Loubser, 1998, Molecular and cellular probes.

Dinucleotide repeat polymorphism at the D5S99 locus on chromosome 5q33–34

L. Warnich, A. Retief, I. Groenewald, 1995, Human Genetics.

Linkage disequilibrium analysis in a recently founded population: evaluation of the variegate porphyria founder in South African Afrikaners.

J. Groenewald, L. Warnich, I. Groenewald, 1998, American journal of human genetics.

Highly informative dinucleotide repeat polymorphism at the D11S29 locus on chromosome 11q23

L. Warnich, L. Theart, A. Retief, 1992, Human Genetics.

Single nucleotide polymorphisms of the protoporphyrinogen oxidase gene: inter-population heterogeneity of allelic variation.

M. Kotze, J. D. de Villiers, L. Warnich, 2001, Molecular and cellular probes.

Identification of three mutations and associated haplotypes in the protoporphyrinogen oxidase gene in South African families with variegate porphyria.

W. V. D. Van de Ven, E. Schoenmakers, J. Groenewald, 1996, Human molecular genetics.