function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Campbell, Ronald A. & Munroe, Thomas A.', 2],
    ['Fernandes, Berenice M. M. & Goulart, M. B.', 1],
    ['Gibson, David Ian & Bray, Rodney A.', 1],
    ['Lopes, Daniela A. & Mainenti, Adriana & Knoff, Marcelo', 1],
    ['Manter, Harold W.', 1],
    ['McCauley, J. E. & Pequegnat, John E.', 2],
    ['Parukhin, A M', 1],
    ['Tkachuk, L. P.', 1],
    ['Toman, Gerd', 1],
    ['Wang, P. - q.', 1],
    ['Yamaguti, S.', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);