The pharmaceutical company isn't just a quality healthcare holding. It's a compelling income investment as well.Many investors hold a stake in AbbVie (ABBV 0.75%) because it offers exposure to the healthcare sector. Industry-based diversification, however, isn't all the pharmaceutical outfit brings to the table. AbbVie is also a quality dividend stock. If you're looking for a name that serves such a dual purpose, this one is worth considering.AbbVie's plan for life after HumiraAbbVie is the company behind c ...