function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Dankittipakul, Pakawin & Tavano, Maria & Singtripop, Tippawan', 22],
    ['Deeleman-Reinhold, Christa', 3],
    ['Lu, Ying & Chu, Chang & Li, Shuqiang & Yao, Zhiyuan', 2],
    ['Mu, Yannan & Zhang, Feng', 7],
    ['Yang, Weicheng & Deng, Langju & Yu, Hao & Zhong, Yang', 1],
    ['Zhao & Peng', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=36)',
    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);