The presence of contact details according to recruitment status for trials registered in 2012.
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https://figshare.com/articles/dataset/_The_presence_of_contact_details_according_to_recruitment_status_for_trials_registered_in_2012_/899505
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Legend Table 3: Percentages of records for which different aspects of contact details were present for recruiting and not-recruiting trials.
1 Numbers of records for subcategories do not add up to 386 because for three trials no primary sponsor was registered.
创建时间：
2014-01-10
