PPIB and thalassemia: The most frequent β-thalassemia mutations in Thai β0-thalassemia/HbE patients were HBB:c.126-129delCTTT and HBB:c.52A>T in the cohort 1 (45.7% and 26.3%, respectively) and the cohort 2 (51.6% and 23.4%, respectively).