function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Brook, Fred J. & Ablett, Jonathan D.', 1],
    ['Karunarathna, Samantha C. & Priyashantha, K Hasith', 4],
    ['Kiyashko, Anna A. & Malysheva, Ekaterina F. & Antonín, Vladimír', 1],
    ['Niego, Allen Grace T. & Thongklang, Naritsada & Hyde, Kevin D.', 3],
    ['Pugh, Philip J. A. & Scott, Bronwen', 1],
    ['Razzaq, Fauzia & Khalid, Abdul Nasir & Ullah, Zia', 1],
    ['Zambrano-Forero, Cristian J & Davila-Giraldo, Lina R', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    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);