function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Deutsch, Gerfried & Crespo, Manuel B. & Dold, Anthony P.', 1],
    ['Manning, J. C.', 1],
    ['Manning, John', 1],
    ['Martínez-Azorín, Mario & Clark, Vincent Ralph & Pinter, Michael', 2],
    ['Martínez-Azorín, Mario & Pinter, Michael & Deutsch, Gerfried', 1],
    ['Pinter, Michael & Brudermann, Andreas & Crespo, Manuel B.', 1],
    ['Wijnands, Dirk Onno & Heniger, Johannes & Veldkamp, Jan Frederik', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=8)',
    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);