The patient never regained consciousness since the experimental operation.

There is an experimental operation costing $250,000 which can save him.

A delicate operation, even by galactic standards, but hardly experimental.

Mr Parkinson had set off on his voyage after an experimental operation.

While active, she continued her training and experimental operations out of San Diego.

These experimental operations produce only a few hundred tonnes of krill per year.

Recently, doctors have developed an experimental operation performed while the baby is still in the mother's womb.

Fishing began in the early 1960s, when the Soviet Union launched its first experimental operations.

A medical circus followed as surgeons elsewhere tried the experimental operation with little success.

Steve knew that it was the only way to save Jaime, because the government had performed the same experimental operation on him two years earlier.