function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Dubatolov, V. V. & Zinchenko, V. K.', 1],
    ['Ebejer, Martin J. & Nicolosi, Giuseppe', 3],
    ['Evenhuis, Neal L.', 1],
    ['Fallén, Carl Fredrik', 2],
    ['Harym, Younes El & Korneyev, Valery', 3],
    ['Merz, B. & Kofler, A.', 8],
    ['Ozerov, A. L. & Krivosheina, M. G.', 2],
    ['Sforzi, Alessandra & Sommaggio, Daniele', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=22)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);