Zollinger-Ellison Syndrome. A group of symptoms that occur when a tumor called a gastrinoma forms. The tumor, which can be cancerous, releases large amounts of the hormone called gastrin. The gastrin causes too much acid in the duodenum, resulting in ulcers, bleeding, and perforation.PubMed Health Glossary.ollinger-Ellison Syndrome. A group of symptoms that occur when a tumor called a gastrinoma forms. The tumor, which can be cancerous, releases large amounts of the hormone called gastrin. The gastrin causes too much acid in the duodenum, resulting in ulcers, bleeding, and perforation. PubMed Health Glossary.
Share on Facebook Tweet Share Pin Share. LTE is starting to become a reality for prepaid customers on inexpensive plans. Straight Talk, a carrier formed from a partnership between Walmart and Tracfone, is now allowing users who bring smartphones capable with AT&T's LTE network to use the 4G data service.
If both AT&T and Verizon are available where you live, the network you use with Straight Talk will be dependent on the phone you choose. AT&T works on GSM technology, while Verizon uses CDMA, and the technology is not compatible. How to Choose a Network. If you live in an area served by both carriers, the Straight Talk website will offer you phones from both carriers. However, if you know Verizon (or AT&T) has better coverage where you live, you will probably want to get a phone that works on the better network. While not explicitly providing this information on their website, Straight Talk has made it easy to tell. Just look at the letter code at the end of the phone model.