Christopher T. Behr

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Osteonecrosis of the knee should be differentiated into two main categories: (1) primary, spontaneous, or idiopathic osteonecrosis and (2) secondary osteonecrosis (e.g., secondary to factors such as steroid therapy, systemic lupus erythematosus, alcoholism, Caisson decompression sickness, Gaucher’s disease, hemoglobinopathies, etc.). Spontaneous or primary(More)
This paper provides a general statistical methodology for modeling environmental pathogen concentrations in natural waters. A hierarchical model of pathogen concentrations captures site and regional random effects as well as random laboratory recovery rates. Recovery rates were modeled by a Generalized Linear Mixed Model. Two classes of pathogen(More)
We performed a retrospective review to evaluate acute medial collateral ligament injuries of the elbow in professional football players from 1991 to 1996 (5 seasons). There were 5 acute medial collateral ligament injuries in 4 players (1 player with bilateral involvement). All injuries occurred with the hand planted on the playing surface while a valgus or(More)
We defined the anatomic relationship of the anterior cruciate ligament femoral origin to the distal femoral physis in the skeletally immature knee with use of 12 fresh-frozen human fetal specimens (ages, 20 to 36 weeks). Each specimen underwent magnetic resonance imaging, was dissected free of soft tissue, sectioned in the sagittal plane, and stained. The(More)
A clinical and cadaveric example show the EndoButton (Acufex Microsurgical Inc, Mansfield, MA), used for anterior cruciate ligament endoscopic fixation, flipping outside the extensor mechanism or vastus lateralis rather than flipping directly outside the lateral femoral cortex. This pitfall was caused by overdrilling the femoral socket beyond the(More)
Elbow disorders in the athletic population comprise a wide range of injuries from acute trauma to those caused by chronic overuse of the joint. Certain injuries are orthopedic emergencies that must be recognized immediately by the team physician to avoid potential complications. Other overuse injuries need to be accurately diagnosed and treated so further(More)
Transmission losses (TL) are complicated phenomena that characterize the processes of evapotranspiration and infiltration as water moves down a stream. This analysis focuses on transmission losses that occur within the stream and can be computed with data from tandem stream gauges. Data from Walnut Gulch Experimental Watershed (WGEW), in southeast Arizona,(More)
Skin fibroblasts were cultivated in Ham F10 medium supplemented with 15 % fetal calf serum, antibioticantimycotic solution, in 5% carbon dioxide at 37°C. Cells were harvested by trypsin, rinsed three times, suspended in deionized water and lysed by freezing and thawing in an acetone dry-ice bath. Lysates were centrifuged at 2000 g and supernatants were(More)
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