Advocate Illinois Masonic Sleep Center. Advocate Illinois Masonic Vision Services. Advocate Illinois Masonic Medical Center Anticoagulation Clinic. 623 Chicago, IL 60657 Dr. Siddiqi completed her residency in Pediatrics at Cook County Hospital, and a fellowship in Allergy and Immunology at Rush-Presbyterian-St. Lukeâ s Medical Center, both in Chicago. Search more locations. (773) 880-0320 ....