# Retraction Note: Efficient administration of a combination of Nifedipine and sildenafil citrate versus only Nifedipine on clinical outcomes in women with threatened preterm labor: a systematic review and meta-analysis

**Authors:** Elham Manouchehri, Somayeh Makvandi, Mahdieh Razi, Maryam Sahebari, Mona Larki

PMC · DOI: 10.1186/s12887-026-06556-5 · BMC Pediatrics · 2026-02-07

## Full-text entities

- **Diseases:** preterm labor (MESH:D007752)
- **Chemicals:** sildenafil citrate (MESH:D000068677), Nifedipine (MESH:D009543)
- **Species:** Homo sapiens (human, species) [taxon 9606]

## Full text

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Source: https://tomesphere.com/paper/PMC12882147