Given an abstract of a paper, generate a title for this paper such that conveys the key focus of the paper.

Q: Abstract: A prospective study of sixty-four men was conducted before they underwent a total hip arthroplasty to try to identify the factors that are predictive of postoperative urinary retention. Although neither the urological history nor the physical examination provided information that was helpful in accurately identifying the patients who were at risk, those whose peak urinary flow rate was less than seventeen milliliters per second did have a statistically significant likelihood of the development of urinary retention. A system of management that we hope will reduce the incidence of this complication is proposed.

A: Urinary retention in men after total hip arthroplasty.
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Q: Abstract: To summarize the results: Bilirubin removal by hemoperfusion was successfully performed for the first time on a premature infant. The hemoperfusion caused no adverse effects on the clinical state of the infant. The bilirubin removed in 90 min--13 mg--indicates the existence of a large extravascular pool. Hemoperfusion is suggested for bilirubin removal from newborn babies, reducing the need for blood exchange with bank blood.

A: Bilirubin removal from a jaundiced premature infant by resin hemoperfusion.
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Q: Abstract: A specific radioimmunoassay has been established for a growth hormone-dependent insulinlike growth factor (IGF) binding protein (BP) from human plasma. Although the assay was directed against a 53-kD, acid-stable BP subunit, the main immunoreactive BP in the circulation had an apparent molecular mass of approximately 125 kD. Only higher primate species showed cross-reactivity, and IGF-I, IGF-II, and other peptides were without effect. Circulating BP levels in healthy subjects rose threefold from early childhood to puberty. In 65 adults aged 18 to 65, the mean level (+/- SD) was 6.12 +/- 1.43 micrograms/ml, and declined with age. Strong growth hormone-dependence of BP was also seen; there was a 2.2-fold increase in active acromegaly and a 50-80% reduction in growth hormone deficiency. Poorly controlled diabetic subjects had BP levels 40% below normal, whereas in renal failure and third-term pregnancy a mild elevation was seen. Measurement of BP may provide a useful adjunct to IGF assays in growth disorders.

A:
Radioimmunoassay of growth hormone-dependent insulinlike growth factor binding protein in human plasma.
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