Blasco Oliete 2004.

Trial name or title	Not stated.
Methods	Randomised clinical trial.
Participants	Pregnant women smoking at least 1 cigarette each day attending 4 clinics in Madrid, Spain.
Interventions	Brief counselling (3 to 5 minutes) on smoking cessation compared with a group intervention over 3 half‐hour sessions.
Outcomes	Not clear.
Starting date	Not clear.
Contact information	meliton65@eresmas.com No response from authors to written request for further trial information on 18/7/2012.
Notes	Original article in Spanish. Email sent to author 11/11/15, no response. Study report (2004) describes the study design. No papers including results have yet been identified.