A centrally registered identifier that is assigned for a specific clinical trial registered in the Iranian registry of clinical trials (IRCT). The format for the registry number is “IRCT” followed by a 14-digit number, one letter and again one or two numbers, e.g., IRCT20100228003449N29.

IRCT identifier

https://www.who.int/ictrp/network/primary/en/

http://www.irct.ir/