Morrissey in March in Los Angeles. (Getty Images/Kevin Winter)

The singer Morrissey is pulling out of the remainder of his U.S. tour citing multiple illnesses. Twenty-three shows by the former Smiths frontman, including an April 5 date at the National Theatre in D.C., have been canceled.

According to a press release from a tour promoter, Morrissey, 53, has been suffering recently from a bleeding ulcer, double pneumonia, and Barrett’s esophagus, a condition in which the patient’s esophagus takes on an acidic lining similar to the one found in the stomach.

People who purchased tickets for any of the affected shows can obtain refunds at the original points of purchase. The canceled dates are:

March 18: Lawrence, Kan. @ Liberty Hall
March 19 Lincoln, Neb. @ Rococo Theatre
March 22: Minneapolis @ Orpheum
March 23 Chicago @ Chicago Theater
March 27 Clear Lake, Iowa @ Surf Ballroom
March 29 Nashville, Tenn. @ Ryman Auditorium
March 30 Atlanta @ Cobb Energy Center
April 2 Asheville, N.C. @ Orange Peel
April 3 Richmond, Va. @ National
April 5 Washington @ The National Theatre
April 6 Philadelphia @ Tower Theater
April 8 Flint, Mich. @ Whiting Auditorium
April 9 Indianapolis @ Murat Theater
April 12 Beaumont, Texas @ Jefferson Theater
April 13 Pharr, Texas @ Pharr Entertainment Center
April 15 Dallas @ Palladium
April 16 Austin, Texas @ Austin Music Hall
April 19 Phoenix @ Marquee Theater
April 20 Las Vegas @ The Chelsea at The Cosmopolitan of Las Vegas
April 23 El Paso, Texas @ Tricky Falls
April 26 Denver @ Temple Hoyne Buell Theatre
April 28 Salt Lake City @ Kingsbury Hall
April 30 San Francisco @ The Warfield