A sub-study, or ancillary study, is a study performed on a sub group of the subjects included in the clinical trial. For example, a pharmacokinetics or pharmacogenetics sub-study may include a sample of the patients participating in the clinical trial. …

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World Health Organisation Universal Trial Number. The UTN is a number, obtained by the trial’s sponsor or principal investigator and is used for the identification of clinical trials worldwide. Source: EU Clinical Trials Register

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During the study it is necessary to provide all clinical centers with the Investigational Product (IP), refill the stocks (if necessary), properly manage the IP in each centers (IP accountability) and retrieve IP before its expiring or at the end …

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Amendments are changes to the study protocol (and any other applicable study-related documents). They can be substantial or not substantial. – Substantial amendments must be submitted to the involved Ethic Commettees (ECs) and Competent Authorities (CAs), if applicable.The Sponsor must …

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