function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Béthoux, Olivier', 1],
    ['Chen, Zhi-Teng', 1],
    ['MO, RAORAO & WANG, GUOQUAN & YANG, DING & LI, WEIHAI', 1],
    ['Newell, Robert L. & Baumann, Richard W.', 1],
    ['Stark, Bill P. & Sivec, Ignac', 8],
    ['Xiang, Ya-Nan & Huo, Qing-Bo & Du, Yu-Zhou', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=14)',
    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);