Given an abstract, indicate which of the provided candidate titles (Option1 and Option2) best describes it (respond with the text of the title, not option1/2).
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Question: Abstract: Quantitative evaluation of stainable bone aluminum and measurement of bone aluminum content were done in 55 patients on chronic maintenance dialysis. All patients underwent bone biopsies. Histomorphometry of static and dynamic parameters of bone structure, bone formation and resorption, and quantitation of stainable bone aluminum at the osteoid-bone interface were performed. In addition, bone aluminum content was measured by atomic absorption spectrophotometry. Bone aluminum content was elevated in all patients (81 +/- 9.6 vs. 18 +/- 6 micrograms/g dry wt) and stainable aluminum was found in 47% of them. All patients with predominant low-turnover osteomalacia or adynamic bone disease displayed stainable bone aluminum. In contrast, stainable bone aluminum was not present in individuals with predominant-hyperparathyroid bone disease. Patients with stainable aluminum had lower bone mass (P less than 0.05), higher volume and surface of lamellar osteoid (P less than 0.01), less volume and surface of woven osteoid (P less than 0.05 and P less than 0.01), lower osteoblastic and osteoclastic indices (P less than 0.01), less doubly labelled osteoid seams, lower mineral apposition rate and lower bone formation rates (P less than 0.05 to P less than 0.01). Stainable aluminum correlated with volume of lamellar osteoid and cellular parameters of bone formation and resorption, mineral apposition rate, and bone formation rates (P less than 0.05 to P less than 0.001). In contrast, bone aluminum content correlated with volume of lamellar osteoid only (P less than 0.001). These findings indicate that stainable aluminum at the mineralization front and not aluminum content of bone reflects the histopathologic changes found in bone of dialyzed patients.
Which is the apt title for the abstract? option1: Stainable aluminum and not aluminum content reflects bone histology in dialyzed patients. option2: Sam Holzman.

Answer: Stainable aluminum and not aluminum content reflects bone histology in dialyzed patients.

Question: Abstract: During development, cells become progressively restricted, until they reach their final phenotype. Differentiation was originally thought to be irreversible, but phenotypic plasticity has been observed in a variety of cell types, for example sympathetic neurones, the limb blastema and some glial cell types. A detailed description of the individual steps that lead to expression or reversal of phenotype is essential to understand the molecular events underlying cell differentiation. We examined whether ciliary neurones acquire adrenergic properties when exposed to a permissive embryonic environment. Cholinergic neurones were selectively labelled with a retrogradely transported marker and injected into chick embryos during active neural crest migration. Four to five days after injection, some of the labelled neurones were found in 'adrenergic sites' and had developed catecholamine histofluorescence. The cells had thus accumulated adrenergic neurotransmitters even after differentiation into cholinergic neurones. This result shows that neurotransmitter plasticity occurs in cholinergic neurones and suggests that the neurotransmitter phenotype can be modified by the embryonic environment.
Which is the apt title for the abstract? option1: Cholinergic neurones acquire adrenergic neurotransmitters when transplanted into an embryo. option2: Quantitative CT applications: comparison of current scanners [published erratum appears in Radiology 1987 Sep;164(3):879]

Answer: Cholinergic neurones acquire adrenergic neurotransmitters when transplanted into an embryo.

Question: Abstract: It is postulated that the repetitive thrust of a sensitized blood vessel, at the peak of systole, against a taut pia-arachnoid fiber may produce or accentuate vasospasm.
Which is the apt title for the abstract? option1: Cerebral vasospasm: a theoretical relationship between systolic thrust and pia-arachnoid fibers. option2: Scienceless to homeless [editorial]

Answer:
Cerebral vasospasm: a theoretical relationship between systolic thrust and pia-arachnoid fibers.