function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bezděk, Aleš & Hájek, Jiří', 15],
    ['Cambefort, Yves & Bordat, Patrice', 3],
    ['Kaneko, Naoki & Wada, Kaoru', 1],
    ['Kusan, Ivana & Matocec, Neven & Jadan, Margita & Tkalcec, Zdenko', 6],
    ['Ramalho, L. V. & Muricy, G. & Taylor, P. D.', 1],
    ['Raposeiro, Pedro M. & Faustino, Helder & Ferreira, Veronica', 1],
    ['Zhang, Zhi-Yuan & Han, Yan-Feng & Chen, Wan-Hao & Tao, Gang', 3],
    ['Zhang, Zhi-Yuan & Li, Xin & Chen, Wan-Hao & Liang, Jian-Dong', 4],
    ['Ziani, Stefano & Bezděk, Aleš & Branco, Tristão', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=36)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);