general protocol: https://www.encodeproject.org/documents/480f9184-07a5-4e57-bc33-ca6f675a1f97/@@download/attachment/ChIA-PET%20protocol%20for%20ENCODE4_Final.pdf other: https://www.encodeproject.org/documents/0d5e4227-7a85-445a-825c-45bf2bbdba6c/@@download/attachment/ChIA-PET_User_notice.pdf