def filterExperimentFilesUsingStatus(expFileList):
    """filterExperimentFilesUsingStatus returns a subset of the experiment files in expFileList with default status.

    Input:

        expFileList - a list of MadrigalExperimentFile objects to be filtered.

    Returns:

        a subset of expFileList with default status
    """
    retList = []
    for expFile in expFileList:
        if expFile.category == 1:
            retList.append(expFile)
    return retList
