Prior to the introduction of the Global Industry Classification Standard (GICSÂ®) in 1999, Standard & Poorâs used a classification system with 11 sectors and 115 industries, similar to the Standard Industry Classification (SIC), which was introduced in 1937.
Symptoms: Mood-change, lethargy,irritability,confusion,fatigue and memory problems and myself chest pain this past 5 months, could the gas be the problem? Doctor : Thank you for your question. Natural gas or propane inhalation for extended periods of time can lead to headaches, nause a, shortness of breath, dizziness, and altered mental status. It is quite likely that this exposure could be eliciting your symptoms.
Gas can cause pain&mdash;sometimes severe&mdash;in the stomach and abdomen. The pain is often described as sharp and jabbing or cramp-like. These pains can be intense and can change locations quickly.Sometimes, the pain can be confused or mistaken for another condition.as is something everyone suffers from. However, sometimes gas can cause sharp and occasionally severe pain in the stomach.