:Dutch driver Beitske Visser and Norwegian Ayla Agren were discharged from hospital following a six-car pile-up in qualifying for the all-female W Series race at the Belgian Grand Prix on Friday.
The Formula One support series said the pair, plus Britons Abbie Eaton and Sarah Moore, Spaniard Belen Garcia and Liechtenstein's Fabienne Wohlwend who were taken to the medical centre for checks, had been given the all-clear.
"Thankfully it seems everyone is okay. The cars have stood up unbelievably well to what looks like a massive crash," said racing director Dave Ryan.
The crash put fresh scrutiny on the Spa-Francorchamps circuit after several serious accidents, including the death of Formula Two racer Anthoine Hubert two years ago.
Williams F1 reserve Jack Aitken suffered a broken collarbone in a crash at the same place in the Spa 24 Hours endurance race at the end of July.
"There needs to be a change at this corner and I'm very surprised nothing has changed yet. Enough is enough," Alfa Romeo reserve Callum Ilott said at the time on social media.
Friday's crash happened as the cars began the climb up the fast sweep of Eau Rouge towards Raidillon, with Moore and Eaton spinning into the barriers and being hit by the others.
Eaton and Visser's cars were both launched into the air by the impact, with Wohlwend's car turned upside down. The session was red-flagged and then re-started.
Britain's championship leader Jamie Chadwick took pole position.
(Reporting by Alan Baldwin in London, editing by Pritha Sarkar and Rosalba O'Brien)