Ben J Klein

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STUDY DESIGN A case study of spine care system changes in a multispecialty group practice health maintenance organization setting. OBJECTIVES To reduce unnecessary use of imaging and specialty referrals for low back pain in the primary care setting and to reduce spine surgery rates. SUMMARY OF BACKGROUND DATA Results of previous research indicate that(More)
STUDY OBJECTIVES Relapses are common after treatment of decompensated chronic obstructive pulmonary disease (COPD) in the emergency department. The purpose of this study was to identify psychosocial and pulmonary function variables that distinguish patients who relapse from those who do not. DESIGN Retrospective case analysis. A relapse was defined as an(More)
The purpose of this study was to describe and analyze the relationship between health and health behaviors among elderly Hispanic women who were lifetime U.S. residents. The number of elderly Hispanics is expected to grow faster than any other segment of the population within the United States. A random sample of 132 elderly Hispanic women enrolled in a(More)
At a Davidson College lecture in 1972, Dr. Howard Eves defined an equihoop as a binary operator (S, ·) that satisfies the central, idempotent and medial properties. See P1-P3 below. In 1974, Marsha Jean Falco invented an 81 card game called SET. After defining the obvious binary operator on the cards, we show that this card game is a commutative equihoop.(More)
The great influx of children needing assessment has presented all diagnosticians with a large body of patients whose conflicts are relatively unfamiliar ones. These children do not fit into the expectable pattern of normal development, nor is an adult-oriented frame of reference of much help in understanding them. What seems needed is a schema in which the(More)
In the PAC Model we assume there exists a distribution D on the examples X that the learner receives, i.e., when choosing an instance from the sample it is drawn according to D. We assume that D is: 1. Fixed throughout the learning process. 2. Unknown to the learner. 3. The instances are chosen independently. The target concept is specified as a computable(More)
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