Betulinic acid analogs inhibit N- and T-type voltage-gated calcium channels to attenuate nerve-injury associated neuropathic and formalin models of pain oleh Aida Calderon-Rivera, Kimberly Gomez, Santiago Loya-López, E.M. Kithsiri Wijeratne, Harrison Stratton, Cheng Tang, Paz Duran, Kyleigh Masterson, Omar Alsbiei, A.A. Leslie Gunatilaka, Rajesh Khanna