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).

[Q]: Abstract: Studies of airway glands indicate a muscarinic cholinergic regulation of secretion. Because of the cellular complexity of the airways, receptor characterization in whole tissue is unfeasible. Therefore, we utilized homogenates of disaggregated gland cells isolated from cat trachea and the muscarinic antagonist [1-3H]quinuclidinyl benzilate ([3H]QNB) to characterize glandular muscarinic receptors. Receptors of isolated cells were functionally intact as assessed by carbachol (10(-4) M) stimulation of O2 consumption 86 +/- 6% (+/- SE, n = 20). Stimulation was dose dependent (mean effective concentration = 3.5 microM), inhibited by atropine [dissociation constant (KD) = 4.2 nM] but not phentolamine nor propranolol. Specific binding of [3H]QNB to cell homogenates was saturable, of high affinity (KD = 36 pM) and to a single population of receptors. Maximum binding was 58 fmol/10(6) cells or about 35,000 receptors per cell. Estimated affinities for muscarinic agents were in the micromolar range for agonists and nanomolar range for antagonists. Histamine, alpha-adrenergic, and beta-adrenergic agonists and antagonists did not inhibit specific binding. These results suggest that muscarinic receptors on tracheal gland cells are of high affinity and density.
Which is the apt title for the abstract? option1: Characterization of muscarinic cholinergic receptors in cat tracheal gland cells. option2: Health care in transition. Consequences for young physicians. Council on Long-Range Planning and Development.
[A]: Characterization of muscarinic cholinergic receptors in cat tracheal gland cells.

[Q]: Abstract: A case is reported in which an epithelioid sarcoma developed in an apparently benign enchondroma or bone infarct at the site of a chrome-cobalt total knee replacement.
Which is the apt title for the abstract? option1: Epithelioid sarcoma in association with total knee replacement. A case report. option2: Angiosarcoma of the head and neck: review of 11 cases.
[A]: Epithelioid sarcoma in association with total knee replacement. A case report.

[Q]: Abstract: In a retrospective study I assessed operative mortality in patients with biopsy-proven chronic hepatitis. Most patients had no symptoms from their liver disease. All patients were considered to have a viral cause of their chronic hepatitis--five were hepatitis-B surface antigen positive. Seven patients had chronic persistent hepatitis, and 13 had chronic active hepatitis (including four with cirrhosis). Twenty patients underwent 34 operative procedures, including 28 general endotracheal anesthesia and six spinal anesthesia. Although two patients who had preoperative bilirubin levels of 2.5 mg/dl or greater sustained further increases in serum bilirubin postoperatively, the serum liver chemistries of the entire group did not significantly worsen postoperatively. There was no anesthesia-related liver failure or operative mortality. Patients with asymptomatic chronic hepatitis tolerate surgical procedures well.
Which is the apt title for the abstract? option1: Surgical procedures are well tolerated by patients with asymptomatic chronic hepatitis. option2: Silver from Chernobyl [letter]
[A]:
Surgical procedures are well tolerated by patients with asymptomatic chronic hepatitis.