function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bubík, Miroslav & Doláková, Nela & Kvaček, Zlatko', 1],
    ['Howell, Nathan & Krings, Alexander & Braham, Richard R', 2],
    ['Jarvis, Charlie', 7],
    ['Kovar-Eder, Johanna & Kvaček, Zlatko & Teodoridis, Vasilis', 1],
    ['Martin, Jon H. & Lau, Clive S. K.', 1],
    ['Martinetto, Edoardo & Bertini, Adele & Mantzouka, Dimitra', 2],
    ['Reveal, James L. & Chase, Mark W. & Iii, - Apg & Iii, Apg', 1],
    ['Thornhill, Robert & Krings, Alexander & Lindbo, David', 6],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    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);