I A Bukhari - King Faisal University
E A EL-Harith - Institute of Human Genetics, Medical University Hannover, Carl-Neuberg Str. 1, D-30625 Hannover, Federal Republic of Germany
M Stuhrmann - Institute of Human Genetics, Medical University Hannover, Carl-Neuberg Str. 1, D-30625 Hannover, Federal Republic of Germany.