function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Astafurova, Yulia V. & Yu, Maxim & Sidorov, Dmitry A.', 1],
    ['Ebmer, Andreas W. & Ockermüller, Esther & Schwarz, Martin', 2],
    ['Else, George R. & Bolton, Barry & Broad, Gavin R.', 8],
    ['Lhomme, Patrick', 4],
    ['Michez, Denis & Kuhlmann, Michael & Ivanov, Sergey P.', 4],
    ['Noel, Gregoire & Bonnet, Julie & Everaerts, Sylvain', 1],
    ['Proshchalykin, M. Yu. & Astafurova, Yu. V. & Levchenko, T. V.', 2],
    ['Risch, Stephan & Roberts, Stuart P. M. & Smit, Jan', 2],
    ['Zettel, Herbert & Ockermüller, Esther & Schoder, Sabine', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=27)',
    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);