function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Astafurova, Yulia V. & Proshchalykin, Maxim Yu.', 3],
    ['Khodaparast, Razeyeh & Monfared, Alireza', 2],
    ['Lhomme, Patrick', 2],
    ['Murao, Ryuki & Tadauchi, Osamu & Miyanaga, Ryoichi', 2],
    ['Niu, Ze-Qing & Wu, Yan-Ru & Huang, Da-Wei', 2],
    ['Patiny, Sébastien & Michez, Denis', 1],
    ['Risch, Stephan & Roberts, Stuart P. M. & Smit, Jan', 2],
    ['Rozen, Jerome G. & ÖZbek, Hikme T.', 1],
    ['Zettel, Herbert & Ockermüller, Esther & Schoder, Sabine', 2],
    ['de Silva, Nicholai & Packer, Laurence', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);