Definition: 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).
Input: Abstract: This article reviews the literature relevant to the possible causes, prevention, and treatment of hemiplegic shoulder pain. Shoulder pain and stiffness impede the rehabilitation of patients with hemiplegia. The cause of this complication is unknown, but it may be related to the severity of neurological deficits, preexisting or posthemiplegic soft tissue injury, subluxation, brachial plexus injury, or shoulder-hand syndrome. Shoulder pain may be preventable if risk factors can be identified and appropriate prophylaxis applied. Resolution of the condition depends on diagnosis and effective treatment at the onset of the symptoms. More clinical research is needed to clarify the cause of hemiplegic shoulder pain and to document the efficacy of prophylactic and treatment methods.
Which is the apt title for the abstract? option1: Hemiplegic shoulder pain. option2: The late effect of subtotal thyroidectomy and radioactive iodine therapy on calcitonin secretion and bone mineral density in women treated for Graves' disease.
Output:
Hemiplegic shoulder pain.