Please use 2 reference at least no more than 5 years old

An 18-year-old white female presents to your clinic today with a 2-week history of intermittent abdominal pain.  She also is positive for periodic cramping and diarrhea as well as low grade fever.  She also notes reduced appetite. She notes that She admits smoking ½ PPD for the last 2 years. Denies any illegal drug or alcohol use. Does note a positive history of Crohn’s Disease.  Based on the information provided answer the following questions: 

Please use 2 reference at least no more than 5 years old. No wikipidia, no mayo clinic reference, only scholar journals .