function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abul-Sood, Medhat I. & Gadallah, Neveen S.', 3],
    ['Dale-Skey, Natalie & Askew, Richard R. & Noyes, John S.', 4],
    ['Falahatpisheh, Ali & Fallahzadeh, Majid & Dousti, Abu Fazel', 3],
    ['Gawas, Sandesh M. & Gupta, Ankita', 2],
    ['Gowri, Prakash & Manickavasagam, Sagadai & Kanagarajan, Rasappan', 6],
    ['Madl, Michael & F, Chalcis & S, Conura & S, Haltichella', 1],
    ['Narendran, T. C. & van Achterberg, Cornelis', 2],
    ['Pérez-Benavides, A. Lucía & Hernández-Baz, Fernando', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    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);