function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Avivar-Lozano, Laura & Pérez-Guerrero, Sergio & Reis, Fabio', 1],
    ['Duan, Yani & Dietrich, Christopher H.', 2],
    ['Duan, Yani & Dietrich, Christopher H. & Webb, Michael D.', 3],
    ['Duan, Yani & Dietrich, Christopher H. & Zhang, Yalin', 2],
    ['Dutta, Nirmal Kumar & Kwon, Jin Hyung & Suh, Sang Jae', 14],
    ['Fletcher, Murray J. & Dai, Wu', 9],
    ['Khatri, Imran & Webb, Michael D.', 3],
    ['Kushwaha, Sandeep & Khare, Preety & Jahan, Sonam', 2],
    ['Mozaffarian, Fariba & Wilson, Michael R.', 3],
    ['Naveed, Hassan & Shah, Bismillah & Sohail, Kamran & Zhang, Yalin', 9],
    ['Shah, Bismillah & Naveed, Hassan & Webb, Michael D. & Duan, Yani', 12],
    ['Webb, Michael D. & Viraktamath, Chandra A.', 50],
    ['Zhang, Yalin & Duan, Yani', 29]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=139)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);