Table 1. Results of the fluorescent spot test performed at the clinics and in the central laboratory (quality control).

		Quality control
		Deficient	Normal
Clinics	Deficient	85	2 *
	Normal	8 **	1426
	Total	93	1428

*1 wild type male, 1 wild type female

**6 hemizygous Mahidol males, 1 heterozygous Mahidol female and 1 homozygous Mahidol female