One of the largest Catholic health care systems in the country, Mercy, offers a full spectrum of medical services to more than 3 million patients in 33 hospitals and nearly 700 outpatient locations in four states. And back in 2001, that included a small integrative medicine practice in St. Louis that offered chiropractic and a few other alternative medicine services. Michelle Smith, DC, a 2000 Logan graduate, joined Mercy in 2002 to lead its Integrative Medicine and Therapy Services division. While the Sisters of Mercy were strong supporters of integrative medicine, Smith said there was a healthy dose of skepticism …