These healthcare stocks have fantastic dividend track records.In the immortal words of the late, great entertainer Prince, forever "is a mighty long time." For investors, though 15 to 20 years can practically feel like forever. It can be hard to find stocks you'll feel comfortable holding onto for that long.However, three Motley Fool contributors think they've identified excellent dividend growth stocks you can buy and hold forever (or at least, the investing version of forever): Abbott Laboratories (ABT -1 ...