Inland Real Estate Acquisitions, Inc. has acquired two medical office buildings in Houston, both of which are leased to U.S. Pain & Spine Institute. The Houston Hospital for Specialized Surgery, located at 5445 La Branch St., measures 34,600 square feet and offers surgical beds and three operating rooms. The USPS Surgical Institute, located at 8111 Southwest Freeway, measures 37,000 square feet and serves as an ambulatory surgery center.