function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Biswas & Raychaudhuri', 2],
    ['Biswas, B. & Biswas, K', 3],
    ['Dankittipakul, Pakawin & Tavano, Maria & Singtripop, Tippawan', 13],
    ['Deeleman-Reinhold, Christa', 7],
    ['Feng, Zhang & Fu, Jianying', 3],
    ['Lin, Yejie & Li, Shuqiang & Pham, Dinh-Sac', 2],
    ['Sankaran, Pradeep M. & Caleb, John T. D.', 12],
    ['Tso, I-Min & Zhu, Ming-Sheng & Zhang, Jun-Xia & Zhang, Feng', 2],
    ['Zhang, Feng & Fu, Jian-Ying', 1],
    ['Zhang, Feng & Fu, Jian-Ying & Zhu, Ming-Sheng', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=50)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);