In the case of permitted digital reproduction, please credit the National Cancer Institute as the source and link to the original NCI product using the original product's title; e.g., “Bile Duct Cancer Causes and Risk Factors was originally published by the National Cancer Institute.” 
In the case of permitted digital reproduction, please credit the National Cancer Institute as the source and link to the original NCI product using the original product's title; e.g., “Bile Duct Cancer Causes and Risk Factors was originally published by the National Cancer Institute.” 