Whatever their devotion to poverty, they could not sleep on the ground in winter when they were in Germany.
"I was so stressed out, I could not sleep at night, " he says.
"I could not sleep the night we got the election results, " he confesses.
"My father could not even watch movies about the war because he could not sleep afterwards, " remembers his son, Sergei.
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Some were worried that their homes would be devalued and others could not sleep because of a "persistent whine", he said.
It was driving her crazy because it started about four in the morning and she could not sleep, nor could she locate the injured feathered-friend.
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"My parents worked nights and were worried about leaving us at home in case someone came in and hurt us, my father had to take tablets because he could not sleep, " he said.
The researchers said that knowing more about the risks faced by people with the sleep disorder could not only help doctors to advise their patients, but also to work in the years to come to come up with ways to protect them.
When he left he said he could not hold down a job and was forced to sleep rough.
Just last night BBC South East heard from a couple from Ramsgate who said they had been forced to sleep in their car because they could not afford to travel to hospital appointments in London twice in a 48-hour period.
When it was very, very hot in the middle of the day there was not point in being out, and you could actually use that period to get some sleep so you needed less sleep at night.
No one, not even museum curators, could say whether the thin, mostly immobile Swinton is actually getting some sleep while people stare at her.
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