function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Huang, - Y. & Lin, - B.', 2],
    ['Li, Yong-Jun & Nel, André & Ren, Dong & Zhang, Bing-Lan', 1],
    ['Li, YongJun & Nel, André & Ren, Dong & Pang, Hong', 2],
    ['Li, Yongjun & Nel, André & Ren, Dong & Pang, Hong', 2],
    ['Zhang, Bing-Lan & Fleck, Gunther & Huang, Di-Ying & Nel, André', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=12)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);