... 5 3:1 21-129.27. Hydbring E, Nyman S, Dahlborn K: Changes in plasma cortisol,plasma β-endorphin, heart rate, haematocrit and plasmaprotein concentration in horses during restraint and use of a naso-gastric ... Edited by: Grandin T. Wallingford, Oxon,CABI; 199 3:2 33-252. 21. Oikawa M, Takagi S, Anzai R, Yoshikawa H, Yoshikawa T: Pathologyof equine respiratory disease occurring in association withtransport. ... Medicine and ScienceCórdoba, Spain; 199 8:5 3-56. 26. Hamra JG, Kamerling SG, Wolfsheimer KJ, Bagwell CA: Diurnal var-iation in plasma ir-beta-endorphin levels and experimentalpain threshold in...