1 Subjects: “...back conversion pathway...”

2 Subjects: “...back fat...”

3 Subjects: “...back muscle strength...”

4 Subjects: “...safety back-ups...”

5 Subjects: “...chronic low back pain (cLBP)...”

6 Subjects: “...low back pain...”

7 Subjects: “...back propagation algorithm...”

8 Subjects: “...metal back glenoid...”

9 Subjects: “...metal back glenoid...”

10 Subjects: “...back-extraction...”

11 Subjects: “...die-back of poplars...”

12 Subjects: “...die-back...”

13 Subjects: “...straw back-throwing device...”

14 Subjects: “...rasterstereographic back shape analysis...”

15 Subjects: “...extended back electromotive force (EEMF)...”

16 Subjects: “...back-propagation neural network...”

17 Subjects: “...back propagation (BP) neural network...”

18 Subjects: “...back propagation model...”

19 Subjects: “...back propagation model...”