function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Breure, Abraham S. H. & Tardy, Emmanuel', 2],
    ['Dedov, Ivailo & Antonova, Vera', 2],
    ['Griffiths, O. L. & Herbert, D. G.', 3],
    ['Muratov, Igor V.', 10],
    ['Neubert, Eike & Damme, Dirk van', 2],
    ['Rowson, B & Warren, B. H. & Ngereza, C. F.', 1],
    ['Salvador, Rodrigo B.', 1],
    ['Watters, G. Thomas', 59]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=80)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);