Table 4.

Metals considered by author: most frequently analyzed.

As	[15,27,30,36,37,40,42]
Cd	[7,15,20,24,30,37,48]
Cu	[7,15,18,19,24,25,27,28,29,31,33,37,38,42]
Hg	[30,32,36,37,41,43,44,47,48]
Mg	[15,28,29,31,37,39]
Mn	[15,19,28,29,31,37,41]
Pb	[7,15,18,24,25,27,28,30,35,38,40,49,50]
Zn	[7,15,19,24,25,28,29,30,31,33,34,37,38,41,48]