Partners HealthCare dominates the Massachusetts healthcare market because of its large physician network, as opposed to its number of hospitals, John McDonough wrote in a Health Stew column on Boston.com. He writes, "[I]npatient hospital capacity is no longer the essential feature of market dominance that it used to be. It's about the docs." He points to various websites about Massachusetts health networks that highlight Partner's domineering number of physician networks--1165 primary care physicians in 15 groups. Column