<title>Perl</title> <title>program</title> program <title>targeted_therapy</title> targeted_therapy <title>participant</title> participant <title>targeted_therapy->participant</title> of_participant <title>participant_status</title> participant_status <title>participant_status->participant</title> of_participant <title>image_collection</title> image_collection <title>study</title> study <title>image_collection->study</title> associated_with <title>participant->study</title> belongs_to <title>non_targeted_therapy</title> non_targeted_therapy <title>non_targeted_therapy->participant</title> of_participant <title>radiotherapy</title> radiotherapy <title>radiotherapy->participant</title> of_participant <title>diagnosis</title> diagnosis <title>diagnosis->participant</title> of_participant <title>data_file</title> data_file <title>data_file->participant</title> of_participant <title>data_file->participant</title> associated_with <title>data_file->diagnosis</title> associated_with <title>data_file->study</title> associated_with <title>specimen</title> specimen <title>data_file->specimen</title> associated_with <title>demographic</title> demographic <title>demographic->participant</title> of_participant <title>study->program</title> belongs_to <title>exposure</title> exposure <title>exposure->participant</title> of_participant <title>specimen->participant</title> of_participant <title>surgery</title> surgery <title>surgery->participant</title> of_participant <title>principal_investigator</title> principal_investigator <title>principal_investigator->study</title> directs <title>associated_link</title> associated_link <title>associated_link->study</title> associated_with