The potential impact of thiomersal on autism has been investigated extensively.

The antitumor potential of cartilage has been investigated extensively in laboratory and animal studies.

It "is the most extensively investigated burial ground on the island of Cyprus".

Human allergenic reactions to lipocalins have not been extensively investigated.

For example, the question of a link between induced abortion and breast cancer has been investigated extensively.

A bureau official played down the accusations, saying most had been extensively investigated before.

Some of these have been extensively investigated and described in reports.

Chris Hughes, one of our graduate students, has investigated it quite extensively.

Therefore, the phenomenon has been investigated extensively over the world since Nukiyama first characterized it.

This polymorphism has been extensively investigated in over 300 scientific studies (as of 2006).