Two hypotheses have been proposed for why this was the case.

Several hypotheses have been proposed for the finding of these individuals.

The meaning of the association is not clear in this study, however, several hypotheses can be proposed.

Many hypotheses have been proposed ranging from the cultural to the political and economic.

To explain the data above, two hypotheses were originally proposed.

The causes of this are unclear and several hypotheses have been proposed.

Several hypotheses have been proposed to explain the increase in asthma (Box 1).

The hypothesis was proposed long after any modifications to Phoenix could be made.

Two hypotheses have been proposed for the role of turns in protein folding.

Many hypotheses have been proposed for this dieback, see below.