def render_items(items):
    """
    Render a sequence of pairs or an `OrderedDict` as a HTML list.

    The function skips the items whose values are `None` or `False`.

    :param items: a sequence of items
    :type items: list or tuple or OrderedDict
    :return: rendered content
    :rtype: str
    """
    if isinstance(items, dict):
        items = items.items()
    return (
        "<ul>"
        + "".join(
            "<b>{}:</b> {}</br>".format(key, value)
            for key, value in items
            if value is not None and value is not False
        )
        + "</ul>"
    )