function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Gupta, Sunil Kumar & Chandra, Kailash', 6],
    ['Lucanas, Cristian C. & Lit, Ireneo L.', 1],
    ['Lucañas, Cristian C. & Bláha, Martin & Rahmadi, Cahyo', 1],
    ['Trotter, Andrew J. & Main, Dean C. & Finston, Terrie L.', 6],
    ['Vidlička, Ľubomír & Vršanský, Peter & Kúdelová, Tatiana', 2],
    ['Vidlička, Ľubomír & Vršanský, Peter & Shcherbakov, Dmitrij E.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);