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You can search for trials based on the type of cancer, the age of the patient, and where the trials are being done.General information about clinical trials is also available.Some clinical trials are open only to patients who have not started treatment.Clinical trials are listed in PDQ and can be found online at NCI's website.The information in this patient summary was taken from the health professional version, which is reviewed regularly and updated as needed, by the PDQ Integrative, Alternative, and Complementary Therapies Editorial Board.A clinical trial is a study to answer a scientific question, such as whether one treatment is better than another.During treatment clinical trials, information is collected about the effects of a new treatment and how well it works.

Each trial answers certain scientific questions in order to find new and better ways to help cancer patients.Information about using the images in this summary, along with many other images related to cancer can be found in Visuals Online.Visuals Online is a collection of more than 2,000 scientific images.smoke contains many of the same substances as tobacco smoke, there are concerns about how inhaled cannabis affects the lungs.

A study of over 5,000 men and women without cancer over a period of 20 years found that smoking tobacco was linked with some loss of lung function but that occasional and low use of cannabis was not linked with loss of lung function.

It cannot be identified as an NCI PDQ cancer information summary unless the whole summary is shown and it is updated regularly. If you want to use an image from a PDQ summary and you are not using the whole summary, you must get permission from the owner.