Articles on aspartame and weight gain? Articles on effects of caffeine?

If you still need more, send me a PM with clear details of what you want.  I have access to the UofT journal collection.

copied from a previous thread. 
It's not caffeeine and weight gain though
GERD and caffeine;
http://archinte.ama-assn.org/cgi/content/abstract/166/9/965
http://www.nutrilearning.com.ar/docs/articulos/interes/gastr o/mod2_role_diet_lifestyle_reflux.pdf

Re: caffeine and ulcers,
http://www.jstor.org/pss/3702584
This is the most recent study I can find because after the discovery of H. pylori people stopped researching it.