F1 team boss Frank Williams out of hospital

Frank Williams (in wheelchair), founder of the Williams Formula One team, arrives at the paddock before the first practice session of Singapore F1 Grand Prix September 19, 2014. REUTERS/Tim Chong

GROVE, England (Reuters) - Formula One team boss and majority shareholder Frank Williams has left hospital after recovering from pneumonia, his daughter and deputy principal Claire Williams said on Thursday.

The 74-year-old, whose team won seven drivers titles and nine constructors' championships between 1980 and 1997, has been tetraplegic and in a wheelchair since a car accident in France in 1986.