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).

Ex Input:
Abstract: Pillars of calcification are rarely found in the skin. An interesting case is described where rows of new bone developed in the skin which had been grafted 31 years previously to cover partial skin thickness burns of the shin. The problems of heterotropic ossification are discussed.
Which is the apt title for the abstract? option1: Calcinosis cutis--a rare late complication of burns. option2: Plicatic acid-specific IgE and nonspecific bronchial hyperresponsiveness in western red-cedar workers.

Ex Output:
Calcinosis cutis--a rare late complication of burns.

Ex Input:
Abstract: Progression of coronary artery stenosis was measured using a quantitative, computer-assisted cinevideodensitometric method in 144 arterial segments in 44 subjects undergoing coronary arteriography on two separate occasions at least 6 months apart. Projected coronary arteriograms were digitized into 512 X 512 pixel mode and percent stenosis was calculated by comparing background-corrected videodensitometric values over stenotic and normal segments. Subjects underwent repeat coronary arteriography because of worsening symptoms of angina or heart failure; subjects with renal failure, coronary artery bypass grafts or cardiac transplant were excluded. Clinical variables determined at the time of the first arteriogram included age, sex, serum cholesterol, systolic blood pressure and presence or absence of cigarette smoking, diabetes mellitus and left ventricular hypertrophy. The mean interval between arteriograms was 29.3 months. Overall progression of coronary stenosis was observed in 40 of the 44 subjects; the mean progression at 24 months was 39% (90% confidence interval, 33 to 45%) and at 36 months was 48% (40 to 56%). The degree of overall progression was related to the length of time between arteriograms (F = 5.81, p less than 0.05) and to serum cholesterol level (F = 4.37, p less than 0.05). These data indicate that using an accurate, quantitative method, it is possible to measure progression of coronary artery atherosclerosis within 2 to 3 years of the initial arteriogram. Serum cholesterol appears to be an important determinant of disease progression.
Which is the apt title for the abstract? option1: Progression of coronary atherosclerotic disease assessed by cinevideodensitometry: relation to clinical risk factors. option2: Fluosol-DA as a red-cell substitute in acute anemia [letter]

Ex Output:
Progression of coronary atherosclerotic disease assessed by cinevideodensitometry: relation to clinical risk factors.

Ex Input:
Abstract: During infragenicular bypass, internal occlusion of the distal vessel avoids unnecessary dissection and potentially damaging use of external clamps or vessel loops while improving exposure and patency. This technique is especially useful in patients with small or calcific vessels in whom distal reconstruction is necessary for limb salvage.
Which is the apt title for the abstract? option1: Internal vessel occlusion: an improved technique for small vessel anastomosis. option2: Accumulating evidence: using meta-analysis to carry out research reviews in pediatrics.

Ex Output:
Internal vessel occlusion: an improved technique for small vessel anastomosis.