Search strategy for MEDLINE
| Search number | Query |
| #1 | Respiratory Distress Syndrome, Adult [mh] |
| #2 | Acute lung injury [mh] |
| #3 | ALI [tiab] OR ARDS [tiab] |
| #4 | Acute [tiab] AND (lung injur* [tiab] OR respiratory distress [tiab] OR respiratory failure[tiab]) |
| #5 | (Severe [tiab] OR critical*[tiab]) AND (respiratory[tiab] OR hypox* [tiab]) |
| #6 | #1 OR #2 OR #3 OR #4 OR #5 |
| #7 | biopsy[mh] AND lung[mh] |
| #8 | (cryosurger*[tiab] OR cryobiopsy[tiab] OR biopsy[tiab]) AND lung[tiab] |
| #9 | bronchoscopy[mh] |
| #10 | Thoracic Surgery, Video-Assisted[mh] |
| #11 | #7 OR #8 OR #9 OR #10 |
| #12 | #6 AND #11 |
| #13 | animals[mh] NOT human[mh] |
| #14 | #12 NOT #13 |