The YPAS was developed and later modified - mYPAS Yale Preoperative Anxiety Scale modified by Kain et al.
La escala EAPY fue desarrollada y posteriormente modificada - EAPY-m Yale Preoperative Anxiety Scale Modified por Kain et al. 1997.
A escala EAPY foi desenvolvida e posteriormente modificada - EAPY-m Yale Preoperative Anxiety Scale Modified por Kain et al.