function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Kandari, Manal Abdulrahman & Khalaji-Pirbalouty, Valiallah', 1],
    ['Chew, Melvin & Abdul Rahim, Azman', 1],
    ['Jarquín-Martínez, Ubaldo & García-Madrigal, María del Socorro', 1],
    ['Jarquín-Martínez, Ubaldo & Gálvez-Zeferino, Neysi', 1],
    ['Kensley, B. & Schotte, M.', 2],
    ['Kim, Sung Hoon & Yoon, Seong Myeong', 1],
    ['Nunomura, Noboru', 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);