MeSH annotation : do not use /util except by MeSH definition; do not confuse with INTERMITTENT POSITIVE-PRESSURE
VENTILATION: IPPB is spontaneous, IPPV is on a ventilator; DF: note short X ref; do not confuse with INTERMITTENT POSITIVE-PRESSURE VENTILATION: IPPB is spontaneous,
IPPV is on a ventilator;