p.skipSpace()
	if p.consume(';') {
		if !p.skipCFWS() {
			return nil, errors.New("mail: misformatted parenthetical comment")
		}
		return group, nil
	}

	for {
		p.skipSpace()
		// embedded groups not allowed.
		addrs, err := p.parseAddress(false)
		if err != nil {
			return nil, err
		}
		group = append(group, addrs...)

		if !p.skipCFWS() {