Good morning Yelena, thank you for the treatment of yesterday, I slept for 3 1/2 to 4 hours. Sinds my colon operation in 2003 I ‘am suffering of insomnia. In 2013 I start getting my sleep back for 1 hour till I have reached 4 hours. The last pass months I lost mine sleep for weeks, and it is always difficult to get mine sleep back. Today I wake up with very less back pain . Nice to have meet you and have a nice