function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Kandari, Manal Abdulrahman & Khalaji-Pirbalouty, Valiallah', 3],
    ['Aneesh, Panakkool-Thamban & Helna, Ammeri Kottarathil', 2],
    ['Martin, Melissa B. & Tuah, Alia & Muhamad, Juariah H.', 6],
    ['Nagasawa, Kazuya & Isozaki, Susumu', 1],
    ['Ravichandran, S. & Vigneshwaran, P. & Rameshkumar, G.', 15],
    ['Vigneshwaran, P. & Ravichandran, S. & Ajith Kumar, T. T.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=28)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);