Persistent pneumothorax is defined as a leak persisting for more than 2 days.
Methane, by contrast, is mostly removed from the atmosphere by chemical reaction, persisting for about 12 years.
The uniform arc is the most stable form of aurora, sometimes persisting for hours without noticeable variation.
She was standing on her porch with her roommates but with heavy rain persisting for hours that night, "there was zero visibility".
"The cyclical and policy challenges we face in our major markets are persisting for longer than we expected," the chief executive, John Fallon, said.
Men were particularly badly hit by losing their jobs, with the serious impact on their happiness persisting for up to five years.
The official White House forecast shows a nation stuck in purgatory for a prolonged period, with high unemployment persisting for years.
Nitrous oxide is destroyed in the stratosphere and removed from the atmosphere more slowly than methane, persisting for around 114 years.
Reports of indolent cases of lymphadenopathy persisting for decades have been described [18].
The patient reported weight loss, asthenia, and polyarthralgia with progressive weakness persisting for 2 months.
Migraine was transient in all 5 patients (100%) persisting for 7-14 days to 3.5 years.
