Did a test group make calls before going to sleep with a land line phone? If so, what were the results there, if not then why not? Surely it'd make sense to try and determine how much might be due to mobile phone emissions and how much is due to the brain being made to do mental work at a time when it's meant to be winding down.

Sleeping with your phone next to your bed also has the same effect even thought in lower doses, it creates overall the same effect due to the time spent next to the phone.