function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Boustani, Mira & Rasmont, Pierre & Dathe, Holger H.', 6],
    ['Griswold, Terry L.', 3],
    ['Lhomme, Patrick', 7],
    ['Maharramov, M. M. & Fateryga, A. V. & Proshchalykin, M. Yu.', 1],
    ['Müller, Andreas', 3],
    ['Risch, Stephan & Roberts, Stuart P. M. & Smit, Jan', 2],
    ['Straka, Jakub & Batelka, Jan & Pauly, Alain', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);