function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['DeMarmels, Jurg', 3],
    ['Feindt, Wiebke & Hadrys, Heike', 5],
    ['Jocque, Merlijn & Garrison, Rosser', 2],
    ['Mauffray, William F. & Tennessen, Kenneth J.', 3],
    ['Neiss, Ulisses Gaspar & Lencioni, Frederico A. A.', 1],
    ['Soldati Lacerda, Déborah S. & Monteiro Machado, Angelo B.', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);