| S | Search history |
| 1 | ((ti contains critical care) OR (ti contains intensive care) OR (ti contains critical* ill*) OR (ti contains ventilat*)) AND (ti contains lateral*) |
| 2 | ((ti contains critical care) OR (ti contains intensive care) OR (ti contains critical* ill*) OR (ti contains ventilat*)) AND (ti contains position*) |
| 3 | ((ti contains critical care) OR (ti contains intensive care) OR (ti contains critical* ill*) OR (ti contains ventilat*)) AND (ti contains turn*) |
| 4 | ((ti contains critical care) OR (ti contains intensive care) OR (ti contains critical* ill*) OR (ti contains ventilat*)) AND (ti contains rotation*) |
| 5 | ((ti contains critical care) OR (ti contains intensive care) OR (ti contains critical* ill*) OR (ti contains ventilat*)) AND (ti contains side lying) |
| 6 | ((ti contains critical care) OR (ti contains intensive care) OR (ti contains critical* ill*) OR (ti contains ventilat*)) AND (ti contains postur*) |
| 7 | Printout 1 to 6 |
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