Where medical disciplines overlap, a specialist in one field may give expert testimony as to the standard of care applicable to areas of the practice of medicine common to both disciplines. Corley v. State, DHH, 32,613 (La.App. 2 Cir. 12/30/99), 749 So.2d 926, 931-32, citing Leyva v. Iberia General Hospital, 94-0795 (La.10/17/94), 643 So.2d 1236; Richardson v. State, 98-918 (La.App. 3 Cir.12/09/98), 726 So.2d 417; Kippers v. Corcoran, 97-870 (La.App. 5 Cir.01/27/98), 707 So.2d 463; Smith v. Juneau, 95-0724 (La.App. 4 Cir.04/09/97), 692 So.2d 1365; and Ricker v. Hebert, 94-1743 (La.App. 1 Cir.05/05/95), 655 So.2d 493.