The National Comprehensive Cancer Network has published a new guideline on smoking cessation for cancer patients that recommends combining pharmacologic therapy with counseling as the most effective approach, along with rigorous review and close follow-ups to prevent relapses.

“Although the medical community recognizes the importance of smoking cessation, supporting patients in ceasing to smoke is generally not done well. Our hope is that by addressing smoking cessation in a cancer patient population, we can make it easier for oncologists to effectively support their patients in achieving their smoking cessation goals,” Dr. Peter Shields , deputy director of the Ohio State University Comprehensive Cancer Center, said in a written statement. Of the estimated 590,000 cancer deaths in 2015, about 170,000, or nearly 30%, will be caused by tobacco smoking. Quitting tobacco improves cancer treatment effectiveness and reduces cancer recurrence, according to the NCCN.

Read the full statement on the NCCN website.