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).

Abstract: Serum from patients with amyotrophic lateral sclerosis (ALS) was tested by immunoblotting for reactivity against three muscle-derived preparations: denervated chick leg muscle extracts, media conditioned by denervated rat hemidiaphragms, and a human muscle extract. For each preparation, multiple bands were present using serum from all patients and controls, and no band was unique to ALS. Against rat muscle-conditioned medium, bands in the 56,000 (56K) molecular weight range were present to an equal degree in ALS and in controls; in addition, different bands near 56K were recognized by serum from different ALS patients. These results fail to confirm a recent report suggesting that anti-56K reactivity is characteristic of ALS.
Which is the apt title for the abstract? option1: Immunoblot analysis of circulating antibodies against muscle proteins in amyotrophic lateral sclerosis and other neurologic diseases. option2: Carotid revascularization after cervical irradiation.
Immunoblot analysis of circulating antibodies against muscle proteins in amyotrophic lateral sclerosis and other neurologic diseases.