function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Armitage, Brian J. & Ríos González, Tomás A.', 17],
    ['Haliday, A. H.', 2],
    ['Kolcsar, Levente-Peter & Oosterbroek, Pjotr', 2],
    ['Podenas, Sigitas', 5],
    ['Qian, Xingyang & Zhang, Xiao', 4],
    ['Ribeiro, Guilherme C. & Santos, Daubian', 12],
    ['Ribeiro, Guilherme Cunha & Lamas, Carlos José Einicker', 2],
    ['Sinclair, Bradley J.', 2],
    ['Starý, Jaroslav', 2],
    ['Zhang, Xiao & Zhang, Zehua & Yang, Ding', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=57)',
    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);