Enhancing clinical data retrieval with Smart Watchers: a NiFi-based ETL pipeline for Elasticsearch queries. - Mohammad Al-Agil; Stephen J. Obee; Vlad Dinu; James T. Teo; David Brawand; Piers E. M. Patten; Anwar Alhaq (BMC Medical Informatics Decis. Mak., 2024)