function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Krishnankutty, Hu. M. & Viraktamath, Ra. A.', 8],
    ['Kushwaha, Sandeep & Khare, Preety & Jahan, Sonam', 3],
    ['Meshram, Naresh M. & Ramamurthy, Vilayanoor V.', 2],
    ['Mozaffarian, Fariba & Wilson, Michael R.', 1],
    ['Naveed, Hassan & Zhang, Yalin', 3],
    ['Xian, Chunlan & Leong, Chi Man & Luo, Jiuyang & Jia, Fenglong', 1],
    ['Yang, Mao-Fa & Meng, Ze-Hong & Li, Zi-Zhong', 12]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=30)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);