The manual of laboratory methodology was developed to provide basic information for testing programs for two genetic characteristics, variant hemoglobins and deficiency of glucose-6-phosphate dehydrogenase (G6Pd). The first section describes the approach to be used for voluntary programs primarily concerned with genetic counseling. In these programs, individual patients will generally request medical advice on the mode of inheritance of abnormal hemoglobins and the consequence of their hemoglobin phenotype on possible ...