Ionizing radiation

<p>This can cause ME/CFS-like symptoms (chronic radiation syndrome).<a href="http://www.ncbi.nlm.nih.gov/pubmed/18667279" rel="nofollow" target="blank" >1</a> More info:&nbsp;<a href="http://www.ncf-net.org/radiation.htm" rel="nofollow" target="blank" >National CFIDS Foundation — Ionizing Radiation and CFIDS/ME</a></p>