function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Aguin-Pombo, Dora & Freitas, Carlos', 4],
    ['Ai, Deqiang & Peng, Lingfei & Zhang, Yalin', 6],
    ['Ai, Deqiang & Wang, Yinglun & Zhang, Yalin', 4],
    ['Borges, Paulo A. V. & Gaspar, Clara', 2],
    ['Fletcher, Murray J.', 33],
    ['Medler, John T.', 6],
    ['Mozaffarian, Fariba', 4],
    ['Peng, Ling-Fei & Fletcher, Murray J. & Zhang, Ya-Lin', 12],
    ['Peng, Ling-Fei & Wang, Ying-Lun & Zhang, Ya-Lin', 3],
    ['Peng, Lingfei & Fletcher, Murray & Zhang, Yalin', 6],
    ['Stroiński, Adam & Malenovský, Igor & Świerczewski, Dariusz', 8],
    ['Stroiński, Adam & Świerczewski, Dariusz', 12],
    ['Walker, Francis', 10],
    ['Zhang, Ya-Lin & Peng, Ling-Fei & Wang, Ying-Lun', 8],
    ['Świerczewski, Dariusz & Stroiński, Adam', 10],
    ['Other (15)', 22]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=150)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);