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. 2013 Jun 27;105(13):947–953. doi: 10.1093/jnci/djt137

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Published by Oxford University Press 2013.

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Figure 4. — Early-phase trial development stage timelines pre–Operational Efficiency Working Group (OEWG) vs post-OEWG. Data shown as median days, with the bars representing the first and third quartiles of the distributions. For letter of intent (LOI) submission to LOI approval, there were 525 pre-OEWG trials and 159 post-OEWG trials with submitted LOIs. For LOI approval to protocol submission, there were 524 pre-OEWG trials and 152 post-OEWG trials with approved LOIs. For protocol submission to trial activation, there were 522 pre-OEWG trials and 143 post-OEWG trials with submitted protocols.