Nearly 5,600 people lined up outside the Los Angeles Sports Arena on April 25 to claim wristbands and a chance for free dental and medical treatment at a massive health clinic this week. The seven-day clinic, which starts April 27, will include vision exams, mammograms, and diabetes screening, among other services. A team of more than 300 volunteer doctors, dentists and other medical professionals each day will see patients from 6 a.m. to 6 p.m.