function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bella, Salvatore & Aguiar, António M. F. & Kunz, Gernot', 4],
    ['Cao, Wenjun & Xing, Jichun', 28],
    ['Dai, Wu & Fletcher, Murray J. & Zhang, Yalin', 9],
    ['El-Sonbati, Saad & Wilson, Michael & Dhafer, Hathal Al', 2],
    ['Fletcher, Murray J. & Dai, Wu', 4],
    ['Meshram, Naresh M. & Chaubey, Rahul', 3],
    ['Mozaffarian, Fariba', 1],
    ['Mozaffarian, Fariba & Wilson, Michael R.', 1],
    ['Singaravel, M. & Singaravel, M.', 3],
    ['Valeria Trivellone & Eva Knop & Tabea Turrini & Line Andrey', 1],
    ['Viraktamath, C. A. & Anantha Murthy, H. V.', 24]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=80)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);