Yes it is true. Some of the private hospitals in Dallas have groups covering closed ICU's and shifts are assigned along with rotating calls. Depends on who comprises the group but it seems to be a better situation time-wise. At Southwestern, critical care is divided among the pulmonologists, cardiologists, anesthesiologists, and surgeons along specialty lines (MICU, cardiovascular ICU, surgical ICU, thoracic ICU, neuro ICU) with the anesthesiologists crossing the fields with their rotating critical care specialists.