Acknowledgements.

Abbreviations.

1 A 64-year-old woman with recurrent fever and cough,.

2 A 5-year-old girl with a painful hip,.

3 A 64-year-old woman with shortness of breath and ill fitting shoes,.

4 A 50-year-old psychologist who feels dizzy,.

5 A 74-year-old man with discomfort on eating,.

6 A 49-year-old teacher with dysuria and fever,.

7 A 70-year-old widow with severe pain in left shoulder,.

8 A 61-year-old clerk with excruciating abdominal pain,.

9 A 75-year-old man who fell to the floor,.

10 A 5-year-old boy with a swollen right ankle,.

11 A 78-year-old pale woman with fever,.

12 A 66-year-old retired truck driver with urinary frequency,.

13 A 30-year-old electrician with fever and vomiting,.

14 A 30 - year-old singer who could not open his mouth,.

15 A 68-year-old cashier with a loss of appetite,.

16 A 41-year-old teacher with pruritic rash,.

17 A 70-year-old gardener with backache,.

18 A 22-year-old student with a lump on the side of his neck,.

19 A 70-year-old sailor with heartburn and crimson face,.

20 A 62-year-old housekeeper with unusual gait,.

21 A 72-year-old librarian with diabetes,.

Appendices.

Index