Ang, M.A. et al. 2022. Non-parametric Clinical Laboratory Reference Interval Estimation in Volunteer Blood Donors : An Example for Prothrombin Time and Partial Thromboplastin Time. PJP. 7, 2 (Dec. 2022), 23–37. DOI:https://doi.org/10.21141/10.21141/PJP.2022.15.