IOWA CITY — Already the state’s largest hospital system, University of Iowa Health Care recently added to its sprawling footprint a 507,000-square-foot, 14-floor Stead Family Children’s Hospital. It also built a 61,067-square-foot North Dodge Clinic on the east side of Iowa City, is expanding its Iowa River Landing clinic in Coralville and has extended its reach across the region and state with quick-care clinics and hospital collaborations.