https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-016-1665-x
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1814-x
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1803-0
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1816-8
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1799-5
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1807-9
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1826-6
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1811-0
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1836-4
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1804-z
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1782-1
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1802-1
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1788-8
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1821-y
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1798-6
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1800-3
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1810-1
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1796-8
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1835-5
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1823-9
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1822-x
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1842-6
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1819-5
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1801-2
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1838-2
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-016-1744-z
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1806-x
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1813-y
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1791-0
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1820-z
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-016-1755-9
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1777-y
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1824-8
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1830-x
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-016-1765-7
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1808-8
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-016-1772-8
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1795-9
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1815-9
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1779-9
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1818-6
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1805-y
https://trialsjournal.biomedcentral.com/articles/10.1186/s13063-017-1825-7