Which of the following vaccines is routinely recommended at 4 months of age? a.Diphtheria, tetanus, acellular pertussis (DaP) b. Oral polio vaccine (OPV) c. Measles, mumps, rubella (MMR) d. Varicella {Ans: a. Diphtheria, tetanus, acellular pertussis (DTaP)}Parents bring their 6-month-old son to see you. He is symmetrically less than the 5th percentile for height, weight and head circumference. He was born at 30 weeks' gestation and weighed 1000g. He was a planned pregnancy, and his mother's prenatal course was uneventful until an automobile accident initiated the labor. He was ventilated for 3 days in the intensive care unit but otherwise did well without ongoing problems. He was discharged at 8 weeks of life. Which of the following is the most likely explanation for his small size? {Ans: Normal ex-premie infant growth}Role-play with equipment during the course of the physical exam would be the most beneficial with which age group? {Ans: preschoolers}You receive a phone call from the mother of a 2-vear-old. She states her child has sleep refusal. You suggest that the child should be able to: a. set his own bedtime based on his internal clock. b. protest when he goes to bed, but the parents