Found inside รข Page 601... B2 - adrenoceptor - induced relaxations in the circular and longitudinal smooth muscle layers of the rat portal vein H. T. RYDNINGEN , T. OMLAND , P. K. OPSTAD * and K. B. HELLE Department of Physiology , PKI , University of Bergen ... New patients or returning patients who have not gone through the new patient process should read the following items: New Patient ....