def parse_see_also(line):
    """Parse field from 'See Also' section of docstring.
    
    Parameters
    ----------
    line : string
        Example 1: '    CALLS : {}'
        Example 2: '    CALLED_BY : {func1}'
        Example 3: '    RELATED : {func1, func2}'
    
    Returns
    -------
    field : set
        {''} returned as empty set instead of {} to allow iteration through the set
        Example 1: {''}
        Example 2: {'func1'}
        Example 3: {'func1', 'func2'}
    
    See Also
    --------
    CALLS : {}
    CALLED_BY : {parse_docstring}
    RELATED : {}
    
    Notes
    -----
    Docstring format adapted from [1]_.
    
    References
    ----------
    .. [1] https://github.com/numpy/numpy/blob/master/doc/example.py
    
    """
    field = line.split(':')[1].strip()
    field = [elt.strip().replace('`', '').replace('\'', '').replace('"', '') for elt in field.split(',')]
    field = [elt.replace('{', '').replace('}', '') for elt in field]
    return set(field)