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. The Division of Laboratory Animal Medicine is accredited by the Association for the Assessment and Accreditation of Laboratory Animal Care, International (AAALAC), New England,. See also Group administration Principle of laboratory animal welfare References Category:Laboratory techniques Category:Laboratory methods Category:Animal testing techniques Category:Ethology Category:Animal welfare Category:Animal tests Category:Laboratory domestication of animalsNew prosthetic heart valve for aortic valve replacement: clinical studies and hemodynamic results. The clinical results and hemodynamic performance of a new modified-Carpentier-Edwards (CE) prosthetic heart valve for aortic valve replacement were evaluated in a comparative trial against two well-known conventional prostheses. The modified CE valve was implanted in 27 patients with aortic stenosis. Clinical evaluation was performed for 2 years and hemodynamic results were obtained for 6 months. The operative results were good, although there was a late mortality. The postoperative hospital stay and the rate of late infection were not different from the values found in patients treated with other prostheses. The use of the modified CE valve was associated with a significant decrease in peak and mean left ventricular pressures, aortic and left ventricular oxygen consumption and pulmonary vascular resistance. There was no significant hemodynamic difference between the modified CE valve and the other two valves. The modified CE valve showed excellent hemodynamic performance. The results were equivalent to those obtained with other prosthetic valves. The long-term results of the modified CE valve should be further investigated.The adaptive significance of autoantibodies as a function of male quality. The presence of antibody responses to several species and tissues is a common feature of mammalian species. In many cases, these responses are predominantly restricted to the male sex. In a recent study it was reported that the presence of antibody responses to murine seminal fluid proteins was under selective pressure in the house mouse, Mus musculus, to enhance male fertility in polygamous males. In this paper we discuss how the presence of antibody responses to sperm antigens may also have been an important factor in the evolution of polyandry in viviparous rodents.People carrying out a welfare audit at an Army barracks in central Queensland have been trapped inside and have to be rescued by fire crews. The army barracks at Holman in Far North Queensland is located on the outskirts of a high-risk area of Camp Hill.