get_registered_4 | R Documentation |
Extract the index of mentions such as: "This registered study on www.clinicaltrials.gov (NCT01375270) was approved by the Ethics Committee of the Capital Region of Denmark (H-3-2010-127), and all subjects provided informed written consent to participate."
get_registered_4(article)
article |
A string or a list of strings. |
Index of element with phrase of interest
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