We are working on a retrospective study looking at relationship between melanoma

We are working on a retrospective study looking at relationship between melanoma, obesity and lymph Node harvest: prognosis and recurrence rates. I need your help in writing the introduction part initially
# Subject: Uncovering the Relationship among Melanoma, Obesity and Lymph Node Harvest: Prognosis and Recurrence Rates
# Outlines:
– Melanoma/obesity
– Melanoma/lymph node harvest
– Melanoma (lymph node (LN) harvest, prognosis, and recurrence rates with obesity)