Which statements are true regarding glucose-6-phosphate dehydrogenase (G6PD) deficiency? (Select all that apply.)
◦ G6PD deficiency is most commonly found in females.
◦ Polycythemia is the most common manifestation.
◦ This deficiency is associated with icterus neonatorum.
◦ G6PD deficiency is a Y-linked recessive genetic disorder.