function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cribb, Thomas H. & Bray, Rodney A. & Barker, Stephen C.', 1],
    ['Etchegoin, Jorge A. & Cremonte, Florencia & Escalante, Alicia H.', 1],
    ['Gupta, A. N. & Sharma, P. N.', 1],
    ['Lunaschi, Lia I. & Álvarez, Victor Hugo Merlo', 1],
    ['Manter, Harold W.', 3],
    ['Margarita Ostrowski de Núñez & Nathalia J. Arredondo', 3],
    ['Polyanski, Y. I.', 1],
    ['Rees, Gwendolen', 1],
    ['Stafford, J.', 1],
    ['Szidat, L.', 1],
    ['Szidat, L. & Nani, A.', 1],
    ['Takeuti, E.', 1],
    ['Viozzi, Gustavo & Flores, Veronica', 1],
    ['Wang, P. - q.', 1],
    ['Yamaguti, S.', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);