Argumentive Essay-Gastric bypass surgery "help"

I need some help with an essay for my english class.  I have just completed an essay about obesity and its effects.  The next assignment is a argumentive paper, I will be doing mine on gastric bypass surgery.  The first part of the paper has to be devoted to exploring both sides of the topic and the second part will be devoted to stating and supporting my position which is for surgery since I have had it and has gone well. If any of you can help me with exploring both sides and if you have any comments that I can use in my paper please email me.  All your help will be greatly appreciated. [email protected] thanks