function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cameron, P.', 1],
    ['Gadallah, Neveen S. & Soliman, Ahmed M. & Dhafer, Hathal M. Al', 7],
    ['Gawas, Sandesh M. & Gupta, Ankita', 3],
    ['Gowri, Prakash & Manickavasagam, Sagadai & Kanagarajan, Rasappan', 6],
    ['Madl, Michael', 2],
    ['Narendran, T. C. & van Achterberg, Cornelis', 12],
    ['Walker, Francis', 4]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=35)',
    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);