Heart Rate Variability as an Alternative Indicator for Identifying Cardiac Iron Status in Non-Transfusion Dependent Thalassemia Patients. - Wijarnpreecha, Karn; Siri-Angkul, Natthaphat; Shinlapawittayatorn, Krekwit; Charoenkwan, Pimlak; Silvilairat, Suchaya; Siwasomboon, Chate; Visarutratna, Pannee; Srichairatanakool, Somdet; Tantiworawit, Adisak; Phrommintikul, Arintaya; Chattipakorn, Siriporn C.; Chattipakorn, Nipon (PLoS ONE, 2015)