(CNN) -- Dozens of concertgoers were hospitalized during a show by superstar DJ Avicii in Boston on Wednesday night, CNN affiliates reported. Local media put the number of patients anywhere between 30 and 80. Massachusetts General Hospital told CNN it received 13 patients between ages 16 and 19. All of the patients are being evaluated, said Kory Zhao, a hospital public affairs officer. Most patients had a problem with dehydration, drugs and alcohol, authorities told CNN affiliate WHDH.
